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AME
AME8755
n General Description
The AME8755 is highly accurate, dual channel, high PSRR, low quiescent current CMOS LDO. The AME8755 includes a reference voltage source, error amplifiers, over current limit and thermal shutdown and consumes only 70A(typical) quiescent current at no load with both channels enabled. The EN function allows the output of each channel to be turned on and off independently.
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
n Typical Application
VOUT 2 EN2 VIN IN OUT2
AME8755
OUT1
VOUT1 C2 1F C3 1F
EN1 C1 1F
GND
n Features
l Guaranteed 150mA Output l Accurate to within + 2% l 1.2V to 3.3V Factory-Preset Output l Over Current Protection l Over Temperature Shutdown l High PSRR (Typ. 70dB) l Low Quiescent Current (Typ. 70A) l All AME's Green Products Meet RoHS Standards.
n Applications
l Mobile Phones l Digital Cameras l PDAs l Wireless LAN Applications
Rev. A.01
1
AME
AME8755
n Function Block Diagram
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
EN2
Overcurrent Limit OUT2
Bandgap Reference
Thermal Shutdown
IN
Overcurrent Limit OUT1 EN1
GND
2
Rev. A.01
AME
AME8755
n Pin Configuration
SOT-26 Top View
6 5 4
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
SOT-26 Top View AME8755-AEYxxxxxx 1. OUT1 2. IN 3. OUT2 4. EN2 5. GND
6 5 4
AME8755-BEYxxxxxx 1. EN1 2. IN
AME8755
AME8755
3. EN2 4. OUT2 5. GND
1
2
3
6. EN1 * Die Attach: Conductive Epoxy
1
2
3
6. OUT1 * Die Attach: Conductive Epoxy
Rev. A.01
3
AME
AME8755
n Pin Description
Pin Name
OUT1
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
Pin Description
LDO voltage regulator output pin. It should be decoupled with a 1F or greater value low ESR ceramic capacitor. Input voltage pin. It should be decoupled with 1F or greater capacitor. LDO voltage regulator output pin. It should be decoupled with a 1F or greater value low ESR ceramic capacitor. Enable pin. When pulled low, the PMOS pass transistor turns off OUT2, current consuming less than 1A. Ground connection pin. Enable pin. When pulled low, the PMOS pass transistor turns off OUT1, current consuming less than 1A.
IN
OUT2
EN2 GND EN1
4
Rev. A.01
AME
AME8755
n Ordering Information AME8755 - x x x xxx xxx
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
Output Voltage 2 Output Voltage 1 Number of Pins Package Type Pin Configuration
Pin Configuration A
(SOT-26)
Package Type E: SOT-2X
Number of Pins Y: 6
Output Voltage1 (Dual LDOs) 330: 300: 285: 280: 180: 120: 3.3V 3.0V 2.85V 2.8V 1.8V 1.2V
Output Voltage2 (Dual LDOs) 330: 300: 285: 280: 180: 120: 3.3V 3.0V 2.85V 2.8V 1.8V 1.2V
1. OUT1 2. IN 3. OUT2 4. EN2 5. GND 6. EN1 1. EN1 2. IN 3. EN2 4. OUT2 5. GND 6. OUT1
B
(SOT-26)
Rev. A.01
5
AME
AME8755
n Available Options
Part Number
AME8755-AEY180280 AME8755-BEY180280
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
Marking
BXHMXX BYGMXX
Output Voltage
VOUT1=1.8V VOUT2=2.8V VOUT1=1.8V VOUT2=2.8V
Package
SOT-26 SOT-26
Operating Ambient Temperature Range
-40OC to +85OC -40OC to +85OC
Note: 1. The first 3 places represent product code. It is assigned by AME such as BXH. 2. A bar on top of first letter represents Green Part such as BXH. 3. The last 3 places MXX represent Marking Code. It contains M as date code in "month", XX as LN code and that is for AME internal use only. Please refer to date code rule section for detail information. 4. Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type.
6
Rev. A.01
AME
AME8755
n Absolute Maximum Ratings
Parameter
Input Voltage Output Current Output Voltage
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
Maximum
-0.3 to +6 PD / [2V IN -(V OUT1+VOUT2)] GND-0.3 to VIN +0.3
Unit
V mA V
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
n Recommended Operating Conditions
Parameter
Ambient Temperature Range Junction Temperature Range Storage Temperature Range
Symbol
TA TJ TSTG
Rating
-40 to +85 -40 to +125 -65 to +150
Unit
o
C
n Thermal Information
Parameter
Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Solder Iron (10Sec)** SOT-26 Conductive Epoxy
Package
Die Attach
Symbol
JC JA
PD
Maximum
81
Unit
o
C/W
260
400 350
mW
o
C
* Measure JC on backside center of molding compund if IC has no tab. ** MIL-STD-202G 210F
Rev. A.01
7
AME
AME8755
n Electrical Specifications
VIN = VOUT + 1V or 2.7V, whichever is higher, where VOUT is the higher one of VOUT1(nom) and VOUT2(nom) , IOUT = 1mA, VEN = VIN and COUT = 1F(X7R), CIN = 1F unless otherwise noted. Typical values are at TA = 25oC. Parameter Input Voltage Output Voltage Accuracy Output Current Quiescent Current Symbol VIN VOUT IOUT IQ VEN = VIN , IOUT = 0mA 3.00V O VOUT O 3.30V Dropout Voltage VDROP IOUT=150mA 2.50V O VOUT O 2.95V 2.20V O VOUT O 2.45V VOUT O 2.15V Output Voltage Line Regulation REGLINE (Note2) Output Voltage Load Regulation (Note3) Output Current Limit Shutdown Current Power Supply Ripple Rejection Enable High (enabled) Enable Low (shutdown) Enable Pin Current (enabled) Thermal Shutdown Temperature REGLOAD ILIM ISHDN PSRR VEN(HI) VEN(LO) IEN TSHDN TRS Note 1. For VOUT O 2.15V, VDROP=2.7V-V OUT Note 2. ( VOUT/ VIN)*% / VOUT Note 3. ( VOUT/VOUT)*% / IOUT VOUT+Vdrop< VIN < 5.5V, where VOUT is the higher one of VOUT1(nom) and VOUT2(nom) 1mA < IOUT < 150mA ROUT = 1 VEN = 0V, VIN(min) < VIN < VIN(max) f = 1kHz, IOUT = 1mA VIN(min) < VIN < VIN(max) VIN(min) < VIN < VIN(max) VEN = VIN Shutdown, temperature increasing Restore, temperature decreasing 1.4 0 0.1 160 140 -0.005 300 0.0025 550 0.1 70 VIN 0.4 1 1 0.005 %/mA mA A dB V V A
O
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
Test Conditions
Min 2.7 -2
Typ
Max 5.5 2
Units V % mA A
150 70 250 300 350 Note 1 120 350 450 550
mV
-0.1
0.025
0.1
%/V
C
8
Rev. A.01
AME
AME8755
n Detailed Description
The AME8755 contains two PMOS pass transistors, a reference voltage source, error amplifiers, over current protection, and thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over current limit, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. The output voltages are controlled and stabilized by a system of negative feedback. The AME8755 requires an output capacitor connected between the output and ground to stabilize the internal control loops. The minimum recommended output capacitor is 1F. The IC's internal circuitry can be turned on and off via the signal from the EN1 and EN2 pins, for example: OUT1 is turned on when EN1 is greater than 1.4V. And OUT1 is turned off when EN1 is less than 0.4V, resulting in greatly reduced power consumption, same operation for EN2 and OUT2. The AME8755's over current limit and thermal shutdown protection prevent the IC from damaging. The internal over current protection helps protect the regulator during fault conditions. During over current protection, the output will be pulled down and source a nearly fixed amount of current that is largely independent of the output voltage. Thermal shutdown protection disables both outputs when the junction temperature of either channel rises to approximately 160oC, allowing the device to cool. When the junction temperature cools to approximately 140oC, the output circuitry is again enabled. This limits the dissipation of the regulator, protecting it from damage due to over heating.
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
Rev. A.01
9
AME
AME8755
VOUT vs. Temperature
1.845 1.833 1.821 1.809
2.884 2.861 2.838 2.815
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
VOUT vs. Temperature
V OUT (V)
1.785 1.773 1.761 1.749 1.737 1.725 -40 -25 -10 +5 +20 +35 +50
V OUT (V)
1.797
2.792 2.769 2.746 2.723
V OUT = 1.8V IOUT = 1mA
+65 +80 +95 +110 +125
o
2.700 2.677 2.654 -40 -25 -10 +5 +20
V OUT = 2.8V IOUT = 1mA
+35 +50 +65 +80 +95 +110 +125
Temperature ( C)
Temperature (o C)
VDROPOUT vs. Temperature
300 285 270 255
IQ vs. Temperature
120 110 100 90
I OUT =1mA IOUT=150mA
VDROPOUT (V)
225 210 195 180 165 150 -40 -25 -10 +5 +20 +35 +50
I Q (A)
V OUT = 2.8V IOUT = 150mA
+65 +80 +95 +110 +125
o
240
80 70 60 50 40 30 20 -40 -25 - 10
+5
Temperature ( C)
Temperature ( C)
Line Transient Response
+20 +35 + 50 +65 o
+80 +95 +110 +125
Line Transient Response
VI N (1V/DIV)
VOUT (20mA/DIV)
VIN (1V/DIV)
TIME (400Sec/DIV)
10
VO UT (20mA/DIV)
VIN = 2.8V~5.5V I OUT = 1mA VOUT = 1.8V
VIN = 3.8V~5.5V I OUT = 1mA V OUT = 2.8V
TIME (400Sec/DIV)
Rev. A.01
AME
AME8755
Load Transient Response
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
Load Transient Response
IL (50mA/DIV)
TIME (40Sec/DIV) V IN = 2.8V VOUT = 1.8V I OUT = 1mA~150mA
I L (50mA/DIV) TIME (40Sec/DIV) VIN =3.8V VOUT = 2.8V IOUT = 1mA~150mA
Power Supply Rejection Ratio
100 90 80 70
100
VIN (100mV/DIV)
VIN (100mV/DIV)
Power Supply Rejection Ratio
90
V IN = 3.8V V OUT = 1.8V
IOUT =1mA IOUT =10mA
PSRR (dB)
80 70 60 50 40 30 20 10 0
V IN = 3.8V VOUT = 2.8V IOUT =1mA IOUT =10mA
PSRR (dB)
60 50 40 30 20 10 0 1K 10K
IOUT =30mA I OUT=100mA
I OUT=30mA IOUT=100mA
100K
1M
1K
10K
100K
1M
Frequency (Hz)
Frequency (Hz)
Rev. A.01
11
AME
AME8755
n Date Code Rule
Month Code 1: January 7: July 2: February 8: August 3: March 9: September 4: April A: October 5: May B: November 6: June C: December Marking A M A M A M A M A M A M A M A M A M A M Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
A A A A A A A A A A
A A A A A A A A A A
X X X X X X X X X X
X X X X X X X X X X
n Tape and Reel Dimension
SOT-26
P
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SOT-26
Carrier Width (W) 8.00.1 mm
Pitch (P) 4.00.1 mm
Part Per Full Reel 3000pcs
Reel Size 1801 mm
12
Rev. A.01
AME
AME8755
n Package Dimension
SOT-26
Top View D e Side View c1
High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO
SYMBOLS A A1 b D E e H L 1 S1
MILLIMETERS MIN
0.90 0.00 0.30 2.70 1.40
INCHES MIN
0.0354 0.0000 0.0118 0.1063 0.0551
MAX
1.30 0.15 0.55 3.10 1.80
MAX
0.0512 0.0059 0.0217 0.1220 0.0709
H
E
L
PIN 1 S1
1.90 BSC 2.60 3.00
0.07480 BSC 0.10236 0.11811 0.0146BSC
o
0.37BSC 0
o
Front View A
10
0
o
10
o
0.95BSC
0.0374BSC
b
Rev. A.01
A1
13
www.ame.com.tw
E-Mail: sales@ame.com.tw
Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. (c) AME, Inc. , February 2009
Document: 1263-DS8755-A.01
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989

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