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Voltage Regulators
AN79Lxx/AN79LxxM Series
3-pin negative output voltage regulator (100 mA type)
I Overview
The AN79Lxx series and the AN79LxxM series are 3-pin, fixed negative output type monolithic voltage regulators. Stabilized fixed output voltage is obtained from unstable DC input voltage without using any external components. 12 types of output voltage are available: -4V, -5V, -6V, -7V, -8V, -9V, -10V, -12V, -15V, -18V, -20V and -24V. They can be used widely in power circuits with current capacity of up to 100mA. AN79Lxx series
5.00.2
5.10.2
Unit: mm
4.00.2
(1.0)
2.30.2 0.60.15
(1.0) 13.50.5
0.43+0.1 -0.05
0.43+0.1 -0.05
I Features
* No external components * Output voltage: -4V, -5V, -6V, -7V, -8V, -9V,-10V, -12V, -15V, -18V, -20V, -24V * Built-in overcurrent limit circuit * Built-in thermal overload protection circuit
2.54
231
1 : Output 2 : Common 3 : Intput
SSIP003-P-0000
AN79LxxM series
4.6 max. 1.8 max.
Unit: mm
1.6 max.
2.6 typ.
0.48 max. 1.5 3.0
0.58 max. 1.5
0.8 min.
4.25 max.
2.6 max.
0.44 max.
3
2
1
1 : Common 2 : Input 3 : Output
HSIP003-P-0000B Note) The packages (SSIP003-P-0000 and HSIP003P-0000B) of this product will be changed to lead-free type (SSIP003-P-0000S and 2 Common HSIP003-P-0000Q). See the new package di(1) mensions section later of this datasheet.
R1 + Voltage Reference
Error Amp.
I Block Diagram (AN79Lxx series)
-
R2 1 Q1 Output (3)
Starter
Thermal Protection
Current Limiter RSC
Pass Tr.
3
Input (2)
Note) The number in ( ) shows the pin number for the AN79LxxM series.
Publication date: December 2001 SFF00006CEB
1
AN79Lxx/AN79LxxM Series
I Absolute Maximum Ratings at Ta = 25C
Parameter Input voltage Power dissipation Operating ambient temperature Storage temperature AN79Lxx series AN79LxxM series Symbol VI PD Topr Tstg Rating -35 *1 -40 *2 650 *3 -20 to +80 -55 to +150 -55 to +125 Unit V V mW C C
*1 AN79L04, AN79L05/M, AN79L06, AN79L07, AN79L08/M, AN79L09/M, AN79L10, AN79L12/M, AN79L15/M, AN79L18 *2 AN79L20, AN79L24 *3 Follow the derating curve. When Tj exceeds 150C, the internal circuit cuts off the output. AN79LxxM series is mounted on a standard board (glass epoxy: 20mm x 20mm x t1.7mm with Cu foil of 1cm2 or more).
I Electrical Characteristics at Ta = 25C
* AN79L04 (-4V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -7 to -19V, IO = 1 to 70mA VI = -6 to -20V, Tj = 25C VI = -7 to -17V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -7 to -19V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -7 to -17V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 55 0.8 200 - 0.4 38 10 4.5 3 Conditions Min -3.84 -3.8 Typ -4 Max -4.16 -4.2 80 40 60 30 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -9V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C
2
SFF00006CEB
AN79Lxx/AN79LxxM Series
I Electrical Characteristics at Ta = 25C (continued)
* AN79L05, AN79L05M (-5V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -8 to -20V, IO = 1 to 70mA VI = -7 to -21V, Tj = 25C VI = -8 to -18V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -8 to -20V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -8 to -18V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 55 0.8 200 - 0.4 40 11 5 3 Conditions Min -4.8 -4.75 Typ -5 Max -5.2 -5.25 100 50 60 30 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -10V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C (AN79L05) and Tj = 0 to 100C (AN79L05M)
* AN79L06 (-6V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -9 to -21V, IO = 1 to 70mA VI = -8 to -22V, Tj = 25C VI = -9 to -19V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -9 to -21V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -9 to -19V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 55 0.8 200 - 0.4 44 12 5.5 3 Conditions Min -5.76 -5.7 Typ -6 Max -6.24 -6.3 120 60 60 30 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -11V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C
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3
AN79Lxx/AN79LxxM Series
I Electrical Characteristics at Ta = 25C (continued)
* AN79L07 (-7V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -10 to -22V, IO = 1 to 70mA VI = -9 to -23V, Tj = 25C VI = -10 to -20V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -10 to -22V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -10 to -20V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 54 0.8 200 - 0.5 48 13 6 3 Conditions Min -6.72 -6.65 Typ -7 Max -7.28 -7.35 140 70 70 40 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -12V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C
* AN79L08, AN79L08M (-8V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -11 to -23V, IO = 1 to 70mA VI = -10 to -24V, Tj = 25C VI = -11 to -21V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -11 to -23V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -11 to -21V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA, Tj = 0 to 125C 54 0.8 200 - 0.6 52 15 7 3 Conditions Min -7.68 -7.6 Typ -8 Max -8.32 -8.4 160 80 80 40 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -14V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C (AN79L08) and Tj = 0 to 100C (AN79L08M)
4
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AN79Lxx/AN79LxxM Series
I Electrical Characteristics at Ta = 25C (continued)
* AN79L09, AN79L09M (-9V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -12 to -24V, IO = 1 to 70mA VI = -11 to -25V, Tj = 25C VI = -12 to -22V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -12 to -24V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -12 to -22V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA, Tj = 0 to 125C 53 0.8 200 - 0.6 58 16 8 3 Conditions Min -8.64 -8.55 Typ -9 Max -9.36 -9.45 160 80 90 50 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -15V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C (AN79L09) and Tj = 0 to 100C (AN79L09M)
* AN79L10 (-10V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -13 to -25V, IO = 1 to 70mA VI = -12 to -26V, Tj = 25C VI = -13 to -23V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -13 to -25V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -13 to -23V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 53 0.8 200 - 0.7 65 17 9 3 Conditions Min -9.6 -9.5 Typ -10 Max -10.4 -10.5 160 80 100 50 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -16V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C
SFF00006CEB
5
AN79Lxx/AN79LxxM Series
I Electrical Characteristics at Ta = 25C (continued)
* AN79L12, AN79L12M (-12V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -15 to -27V, IO = 1 to 70mA VI = -14.5 to -30V, Tj = 25C VI = -15 to -25V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -15 to -27V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -15 to -25V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 52 0.8 200 - 0.8 75 20 10 3 Conditions Min -11.5 -11.4 Typ -12 Max -12.5 -12.6 200 100 100 50 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -19V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C (AN79L12) and Tj = 0 to 100C (AN79L12M)
* AN79L15, AN79L15M (-15V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -18 to -28V, IO = 1 to 70mA VI = -17.5 to -33V, Tj = 25C VI = -18 to -28V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -18 to -30V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -18 to -28V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 51 0.8 200 - 0.9 90 25 12 3 Conditions Min -14.4 -14.25 Typ -15 Max -15.6 -15.75 200 100 130 60 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -23V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C (AN79L15) and Tj = 0 to 100C (AN79L15M)
6
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AN79Lxx/AN79LxxM Series
I Electrical Characteristics at Ta = 25C (continued)
* AN79L18 (-18V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -21 to -33V, IO = 1 to 70mA VI = -21 to -33V, Tj = 25C VI = -21 to -32V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -21 to -33V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -22 to -32V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 50 0.8 200 -1 110 30 15 3 Conditions Min -17.3 -17.1 Typ -18 Max -18.7 -18.9 200 100 160 80 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -27V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C
* AN79L20 (-20V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -23 to -35V, IO = 1 to 70mA VI = -23 to -35V, Tj = 25C VI = -24 to -34V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -23 to -35V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -24 to -34V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 49 0.8 200 -1 135 35 17 3 Conditions Min -19.2 -19 Typ -20 Max -20.8 -21 200 100 180 90 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -29V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C
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7
AN79Lxx/AN79LxxM Series
I Electrical Characteristics at Ta = 25C (continued)
* AN79L24 (-24V type)
Parameter Output voltage Output voltage tolerance Line regulation Load regulation Bias current Bias current fluctuation to input Bias current fluctuation to load Output noise voltage Ripple rejection ratio Minimum input/output voltage difference Output short-circuit current Output voltage temperature coefficient Symbol VO VO REGIN REGL IBias IBias(IN) IBias(L) Vno RR VDIF(min) IO(Short) VO/Ta Tj = 25C VI = -27 to -38V, IO = 1 to 70mA VI = -27 to -38V, Tj = 25C VI = -27 to -37V, Tj = 25C IO = 1 to 100mA, Tj = 25C IO = 1 to 40mA, Tj = 25C Tj = 25C VI = -27 to -38V, Tj = 25C IO = 1 to 40mA, Tj = 25C f = 10Hz to 100kHz, Ta = 25C VI = -28 to -38V, f = 120Hz, Ta = 25C Tj = 25C VI = -35V, Tj = 25C IO = 5mA 49 0.8 200 -1 170 40 20 3 Conditions Min -23 -22.8 Typ -24 Max -25 -25.2 200 100 200 100 5 0.5 0.1 Unit V V mV mV mV mV mA mA mA V dB V mA mV/C
Note 1) The specified condition Tj = 25C means that the test should be carried out within so short a test time (within 10ms) that the characteristic value drift due to the chip junction temperature rise can be ignored. Note 2) Unless otherwise specified, VI = -33V, IO = 40mA, CI = 2F, CO = 1F, Tj = 0 to 125C
I Main Characteristics
PD Ta (AN79Lxx series)
1.0 Independent IC without a heat sink Rth(j-a) = 190C/W PD = 658mW (25C)
PD Ta (AN79LxxM series)
1.0 Mounted on standard board (glass epoxy: 20 mm x 20 mm x t1.7mm with Cu foil of 1cm2 or more) -5.12 -5.08
VO Tj
AN79L05 VI = -10V IO = 1mA
Power dissipation PD (W)
Power dissipation PD (W)
0.8
0.8
Output voltage VO (V)
0 20 40 60 80 100 120 140 160
-5.04 -5.00 -4.96 -4.92 -4.88 -4.84
0.6
0.6
0.4
0.4
0.2
0.2
0 0 20 40 60 80 100 120 140 160
0
-4.80 -25
0
25
50
75
100
125
Ambient temperature Ta (C)
Ambient temperature Ta (C)
Junction temperature Tj (C)
8
SFF00006CEB
AN79Lxx/AN79LxxM Series
I Main Characteristics (continued)
Minimum input/output voltage difference VDIF(min) (V)
VDIF(min) Tj
1.4
AN79L05
Input transient response
AN79L05 15
Load transient response
Input voltage VI (V) Output voltage fluctuation (V)
AN79L05 200
1.2
Output voltage fluctuation (mV)
100
IO = 100mA 1.0
IO 0m IO =1 A IO = 0mA 1m A
10
0 1
=2
5 10
0.8
0 -10 -20
0
0.6
-1 -2
0.4
-50
0
50
100
150
0
2
4
6
8
10
0
10
20
30
40
50
Junction temperature Tj (C)
Time t (s)
Time t (s)
RR f
120 AN79L05 IO = 5mA 100
Ripple rejection ratio RR (dB)
80
60
40
20
0 10 100 1k 10k 100k
Frequency f (Hz)
I Basic Regulator Circuit
-VI Input 3 - + 1 2
Output
-VO
AN79Lxx
- Common + CO
CI
Connect CI of 2F when the input line is long. CO improves the transient response. 1F
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9
Load current IO (mA)
20
AN79Lxx/AN79LxxM Series
I Usage Notes
1. Cautions for a basic circuit
Di
VI 1 2 3
VO
CI
CO
Figure 1
CI: When a wiring from a smoothing circuit to a three-pin regulator is long, it is likely to oscillate at output. A capacitor of 0.1F to 0.47F should be connected near an input pin. CO: Deadly needed to prevent from oscillation (0.33F to 1.0F). It is recommended to use a capacitor of a small internal impedance (ex. tantalum capacitor) when using it under a low temperature. When any sudden change of load current is likely to occur, connect an electrolytic capacitor of 10F to 100F to improve a transitional response of output voltage. Di: Normally unnecessary. But add it in the case that there is a residual voltage at the output capacitor Co even after switching off the supply power because a current is likely to flow into an output pin of the IC and damage the IC.
2. Other caution items 1) Short-circuit between the input pin and GND pin If the input pin is short-circuitted to GND or is cut off when a large capacitance capacitor has been connected to the IC's load, a voltage of a capacitor connected to an output pin is applied between input/output of the IC and this likely results in damage of the IC. It is necessary, therefore, to connect a diode, as shown in figure 2, to counter the reverse bias between input/output pins.
In
1 2 GND
3
Out
Output
- +
CO
Figure 2
2) Floating of GND pin If a GND pin is made floating in an operating mode, an unstabilized input voltage is outputted. In this case, a thermal protection circuit inside the IC does not normally operate. In this state, if the load is short-circuited or overloaded, it is likely to damage the IC.
I Application Circuit Example
-VI Input
3 2
1
Output
-VO
AN79Lxx
VO' R2 - IBias R1 + 1F - + Common 2F
R |VO | = VO' 1 + R1 + IQR1 2 Note) VO varies due to sample to sample variation of IBias . Never fail to adjust individually with R1 .
10
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AN79Lxx/AN79LxxM Series
I New Package Dimensions (Unit: mm)
* SSIP003-P-0000S (Lead-free package)
5.000.20 4.000.20
(1.00)
(1.00)
0.600.15 0.400.10 13.300.50
5.000.20
2.300.20 0.40+0.10 -0.05
1 1.27
3 1.27
* HSIP003-P-0000Q (Lead-free package)
4.500.10 1.550.20
2.500.10
4.00+0.25 -0.20
1 0.40+0.10 -0.05 1.50
3 0.40+0.10 -0.05 0.50+0.10 -0.05 3.00 (0.75)
1.00+0.10 -0.20
0.15 M
0.42+0.10 -0.05
1.500.10
0.10
(0.40)
2.650.10
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11
Request for your special attention and precautions in using the technical information and semiconductors described in this material
(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuit examples of the products. It does not constitute the warranting of industrial property, the granting of relative rights, or the granting of any license. (3) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (4) The products and product specifications described in this material are subject to change without notice for reasons of modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (5) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, redundant design is recommended, so that such equipment may not violate relevant laws or regulations because of the function of our products. (6) When using products for which dry packing is required, observe the conditions (including shelf life and after-unpacking standby time) agreed upon when specification sheets are individually exchanged. (7) No part of this material may be reprinted or reproduced by any means without written permission from our company.
Please read the following notes before using the datasheets
A. These materials are intended as a reference to assist customers with the selection of Panasonic semiconductor products best suited to their applications. Due to modification or other reasons, any information contained in this material, such as available product types, technical data, and so on, is subject to change without notice. Customers are advised to contact our semiconductor sales office and obtain the latest information before starting precise technical research and/or purchasing activities. B. Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited.
2001 MAR

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