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Low Dropout Regulator
General Description
The EC1086 is a series of low dropout positive voltage regulators with a maximum dropout of 1.5V at 1.5A of load current. The EC1086 is available in 1.5V, 1.8V, 2.5V, 3V, 3.3V, and 5.0V versions. The fixed versions integrate the adjust resistors. It is also available in an adjustable version, which can set the output voltage with only two external resistors. The series features on-chip thermal shutdown. It also includes a bandgap reference and a current limiting circuit. The EC1086 series is available in standard packages of TO-263-3L, TO-220, SOT-223 and TO-252.
EC1086
Features
Available in 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5.0V and adjustable versions Low dropout voltage: typical 1.3V at 1.5A Current limiting and thermal protection Low dropout voltage Output current: 1.5A Current limit: 2.3A Operating junction temperature range: 0 ~ 125oC Line regulation: 0.015% (typ.) Load regulation: 0.1% (typ.)
Applications
High efficiency linear regulators Battery charger Post regulation for switching supply Microprocessor supply Motherboard power supply Cable and ADSL modem DVD-Video player Telecom equipment Set top boxes and web boxes modules' supply
TO-263-3L
TO-220
SOT-223
TO-252
Figure 1. Package Types of EC1086
July 2003
Low Dropout Regulator
Pin Configuration
T Package
(TO-220)
EC1086
S Package (TO-263-3L)
INPUT OUTPUT ADJ/GND
3 2 1
3 2 1
INPUT OUTPUT ADJ/GND
D Package (TO-252)
3 INPUT
H Package (SOT-223)
3 INPUT OUTPUT ADJ/GND
2
OUTPUT
2 1
1
ADJ/GND
Top View Figure 2. Pin Configuration of EC1086
Functional Block Diagram
INPUT
Thermal Protection
+
OUTPUT
GND (Fixed Output) ADJ (Adjustable Output)
Figure 3. Functional Block Diagram of EC1086 July 2003
Low Dropout Regulator
Ordering Information
Package SOT-223 Temperature Range 0 C ~ 125 C
o o
EC1086
TO-220
0oC ~ 125oC
TO-263-3L
0oC ~ 125oC
TO-252
0oC ~ 125oC
Part Number EC1086H-ADJ EC1086H-1.5 EC1086H-1.8 EC1086H-2.5 EC1086H-3.0 EC1086H-3.3 EC1086H-5.0 EC1086T-ADJ EC1086T-1.5 EC1086T-1.8 EC1086T-2.5 EC1086T-3.0 EC1086T-3.3 EC1086T-5.0 EC1086S-ADJ EC1086S-1.5 EC1086S-1.8 EC1086S-2.5 EC1086S-3.0 EC1086S-3.3 EC1086S-5.0 EC1086D-ADJ EC1086D-1.5 EC1086D-1.8 EC1086D-2.5 EC1086D-3.0 EC1086D-3.3 EC1086D-5.0
Marking ID H86A H86B H86E H86C H86G H86D H86F EC1086T-ADJ EC1086T-1.5 EC1086T-1.8 EC1086T-2.5 EC1086T-3.0 EC1086T-3.3 EC1086T-5.0 EC1086S-ADJ EC1086S-1.5 EC1086S-1.8 EC1086S-2.5 EC1086S-3.0 EC1086S-3.3 EC1086S-5.0 EC1086D-ADJ EC1086D-1.5 EC1086D-1.8 EC1086D-2.5 EC1086D-3.0 EC1086D-3.3 EC1086D-5.0
Packing Type Tape/Reel
Tube
Tube/ Tape/Reel
Tube/ Tape/Reel
July 2003
Low Dropout Regulator
Absolute Maximum Ratings (Note 1)
Parameter Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) ESD (Human Body Mode) Symbol TJ TS TLEAD ESD -65 Min Max 150 150 300 2000
EC1086
Unit
o o o
C C C
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under"Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter Input Voltage Operating Junction Temperature Range Symbol VIN TJ 0 Min Max 15 125 Unit V
o
C
July 2003
Low Dropout Regulator
Electrical Characteristics
EC1086
Typicals and limits appearing in normal type apply for TJ = 25oC. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0oC to 125oC. (PD maximum power dissipation , see Note 2.)
Parameter
Reference Voltage
Symbol
VREF
Conditions
EC1086-ADJ, IOUT = 10mA, VIN -VOUT = 2V, TJ = 25oC, 10mA IOUT 1.5A, 1.4V VIN - VOUT 6V EC1086-1.5, IOUT =10mA, VIN = 3.5V, TJ = 25oC, 10mA IOUT 1.5A, 3V VIN 10V EC1086-1.8, IOUT = 10mA, VIN = 3.8V, TJ = 25oC, 10mA IOUT 1. 5A, 3.2V VIN 10V EC1086-2.5, IOUT = 10mA, VIN = 4.5V, TJ = 25oC, 10mA IOUT 1.5A, 3.9V VIN 10V EC1086-3.0, IOUT = 10mA, VIN = 4.5V, TJ = 25oC, 10mA IOUT 1.5A, 4.9V VIN 10V EC1086-3.3, IOUT = 10mA, VIN = 5V, TJ = 25oC, 10mA IOUT 1.5A, 4.75V VIN 10V EC1086-5.0, IOUT = 10mA, VIN = 7V, TJ = 25oC, 10mA IOUT 1.5A, 6.5V VIN 10V
Min
1.238 1.225
Typ
1.250 1.250
Max
1.262 1.270
Unit
V
Output Voltage
VOUT
1.485 1.47
1.5 1.5
1.515 1.53
V
1.782 1.746
1.8 1.8
1.818 1.854
V
2.475 2.45
2.5 2.5
2.525 2.55
V
2.97 2.94
3.0 3.0
3.03 3.06
V
3.267 3.235
3.3 3.3
3.333 3.365
V
4.95 4.9
5 5 0.015 0.035 0.3 0.6 0.3 0.6 0.3 0.6 0.3 0.6 0.5 1 0.5 1
5.05 5.1 0.2 0.2 6 6 6 6 6 6 6 6 10 10 10 10
V
Line Regulation
VOUT
EC1086-ADJ,
IOUT = 10mA, 1.5V VIN 10V IOUT = 10mA, 1.5V VIN - VOUT 10V IOUT = 10mA, 1.5V VIN - VOUT 10V IOUT = 10mA, 1.5V VIN - VOUT 10V IOUT = 10mA, 1.5V VIN - VOUT 10V IOUT = 10mA, 1.5V VIN - VOUT 10V IOUT = 10mA, 1.5V VIN - VOUT 10V
% mV mV mV mV mV mV
EC1086-1.5,
EC1086-1.8,
EC1086-2.5,
EC1086-3.0,
EC1086-3.3,
EC1086-5.0,
July 2003
Low Dropout Regulator
Electrical Characteristics (Continued)
EC1086
Typicals and limits appearing in normal type apply for TJ = 25oC. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0oC to 125oC. (PD maximum power dissipation , see Note 2.)
Parameter Load Regulation Symbol VOUT Conditions
EC1086-ADJ,
Min 10mA IOUT 1.5A, VIN - VOUT = 2V 10mA IOUT 1.5A, VIN - VOUT = 2V 10mA IOUT 1.5A, VIN - VOUT = 2V 10mA IOUT 1.5A, VIN - VOUT = 2V 10mA IOUT 1.5A, VIN - VOUT = 2V 10mA IOUT 1.5A, VIN - VOUT = 2V
Typ 0.1 0.2 3 6 3 6 3 6 3 7 5 10 1.3
Max 0.3 0.4 12 20 12 20 12 20 15 20 20 35 1.5
Unit % mV mV mV mV mV V A
EC1086-1.5,
EC1086-1.8,
EC1086-2.5,
EC1086-3.3,
EC1086-5.0, Dropout Voltage Current Limit Minimum Load Current Quiescent Current Ripple Rejection Adjust Pin Current Adjust Pin Current Change Temperature Stability RMS Noise (% of VOUT) Thermal Shutdown Thermal Shutdown Hysteresis Thermal Resistance Junction-to-Case QJC SOT - 223 TO - 263 TO - 220 ILIMIT
IO = 1.5A, VREF = 1% VIN - VOUT = 2V, 1.4V VIN - VOUT 10V (For ADJ) VIN = VOUT + 1.3V fRIPPLE = 120Hz, COUT = 25F Tantalum, IOUT = 1.5A, VIN - VOUT = 3V 60 1.5
2.3 2 5 75 60 120 5 5 10
mA mA dB A A % %
oC o
10mA IOUT 1.5A, 1.4V VIN -VOUT 10V
0.2 0.5
TA = 25oC, 10Hz f 10kHz Junction Temperature
0.003 165 30 20 4 4
C
oC/W
Note 2: Maximum power dissipation see Figure 5 July 2003
Low Dropout Regulator
Typical Performance Characteristics
EC1086
3.40
10.0
3.35
Output Voltage (V)
7.5
3.30
Power (W)
3.25
5.0
SOT223
3.20
2.5
3.15
3.10
0
25
50
75
o
100
125
0.0 25
50
75
100
o
125
Ambient Temperature ( C)
Case Temperature ( C)
Figure 4. Output Voltage vs. Temperature
Figure 5. Maximum Power Dissipation
1.260 1.255
1.3 1.2
Reference Voltage (V)
1.250 1.245 1.240 1.235 1.230 1.225 1.220
Dropout Voltage (V)
1.1 1.0 0.9 0.8 0.7 0.6
TA=0 C
o
TA=25 C
o
0
25
50
75
o
100
125
0.5 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5
Ambient Temperature ( C)
Output Current (A)
Figure 6. Reference voltage vs. Temperature
Figure 7. Dropout Voltage vs. Output Current
July 2003
Low Dropout Regulator
Typical Performance Characteristics (Continued)
EC1086
2.25
100 90
Short Circuit Current (A)
2.00
Adjust Pin Current (uA)
80 70 60 50 40 30 20 10
1.75
1.50
1.25
1.00
0
0
25
50
75
o
100
125
0
25
50
75
o
100
125
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 8. Short Circuit Current vs. Temperature
Figure 9. Adjust Pin Current vs. Temperature
5
80
Minimum Load Current (mA)
Ripple Rejection (dB)
0 25 50 75
o
4
70
60
3
50
2
40
1
30
0
100
125
20 10
100
1k
10k
100k
Ambient Temperature ( C)
Frequency (Hz)
Figure 10. Minimum Load Current vs. Temperature
Figure 11. Ripple Rejection vs. Frequency
July 2003
Low Dropout Regulator
Typical Performance Characteristics (Continued)
EC1086
Figure 12. Load Transient Response
Figure 13. Line Transient Response
July 2003
Low Dropout Regulator
Typical Applications
EC1086
EC1086-AD J VIN 10F Tantalum
+
VIN ADJ
VOUT
+
R1 120
VOUT 22F Tantalum
VOUT=VREF(1+R2/R1) + IADJ . R2
R2
VIN 10F Tantalum
+
VIN
EC1086-5.0 VOUT GND
+
VOUT
22F Tantalum
Figure 14. Typical Applications of EC1086
July 2003
Low Dropout Regulator
Mechanical Dimensions TO-263-3L
EC1086
Unit: mm
3
4.57+0.25 -0.50
10.16+0.13 -0.51
70
7.42 1.270.12
8.84
1.27+0.12
7
8.7+0.95 -0.06
0.060.04
15.250.49
2.670.03 0.380.02
2.540.15
5.6
7.98
1.270.12 0.81+0.18 -0.30
2.54
2.54
0.38
5 3
2.20
3
7
2.54
2.54
33
July 2003
Low Dropout Regulator
Mechanical Dimensions (Continued)
EC1086
TO-220
10.160.50 3.810.25
2.980.40
Unit: mm
0.950.40
0.20
15.371.14 1.85
CJ
9.020.50
1.50x0.20
29.081.20
4.190.63 2.480.40
3
1.460.30
0.381
60
60
0.381 2.54 2.54
8.763
0.813
0.3810.025
July 2003
7
7
Low Dropout RegulatorEC1086
Mechanical Dimensions (Continued) SOT-223 Unit: mm
3.500.20
7.000.30
0.25
2.300.10
0.900.15
4.001.00
0.300.05 R0.150.05 R0.150.05
2 12
2 12
0.710.10 6.500.20
3 6
0.40
2 11
July 2003
1.600.10
2 12
0.050.04
Low Dropout Regulator
Mechanical Dimensions (Continued) TO-252
6.530.15 5.330.10 0.520.06
EC1086
Unit: mm
2.280.10 0.4x45
8
1.200.12
0.800.15 9.800.30
0.510.03 0.070.05 5 0.80.05 0.710.07
1.580.18 0.6
5
2.290.05
4 3 0.51
2.800.20
2.290.05
3 0.
10
30.10
July 2003
5.460.10

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