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Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n General Description
The AME8801/8840 family of positive, linear regulators feature low quiescent current (30A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-23-5 package is attractive for "Pocket" and "Hand Held" applications. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. In applications requiring a low noise, regulated supply, place a 1000 pF capacitor between Bypass and Ground. The AME8801 is stable with an output capacitance of 2.2F or greater.
n Features
l l l l l l l l l l l l
Very Low Dropout Voltage Guaranteed 300mA Output Accurate to within 1.5% 30A Quiescent Current Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Noise Reduction Bypass Capacitor Power-Saving Shutdown Mode Space-Saving SOT-25 (SOT-23-5) Package Factory Pre-set Output Voltages Low Temperature Coefficient
n Applications
l l l l l l l
n Functional Block Diagram
IN
Overcurrent Shutdown
OUT
Instrumentation Portable Electronics Wireless Devices Cordless Phones PC Peripherals Battery Powered Widgets Electronic Scales
n Typical Application
INPUT OUTPUT
IN BYP GND OUT
Thermal Shutdown
EN BYP
AMP
AME8801
R1
C1 5V C2
EN
C3 2.2F
1 F
1nF
V ref = 1 . 2 1 5 V
R2 GND
1
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Pin Configuration
AME8801 SOT-25 Top View
5 4
AME8801 SOT-26 Top View
6 5 4
AME8812 SOT-25 Top View
5 4
AME8840 SOT-25 Top View
5 4
1
2
3
1
2
3
1
2
3
1
2
3
1. VIN 2. GND 3. EN
4. BYP 5. OUT
1. OUT_1 2. GND 3. BYP
4. EN 5. VIN 6. OUT_2
1. EN 2. GND 3. VIN
4. OUT 5. BYP
1. EN 2. GND 3. BYP
4. OUT 5. VIN
n Ordering Information
Part Number AME8801AEEV AME8801BEEV AME8801CEEV AME8801DEEV AME8801EEEV AME8801FEEV AME8801GEEV AME8801HEEV AME8801IEEV AME8801JEEV AME8801KEEV AME8801LEEV AME8801MEEV AME8801NEEV AME8801OEEV AME8801SEEV AME8801JEEY Marking AAFww AAGww AAHww AAIww AAJww ABOww ACFww AEGww AEOww AGQww AHSww AJOww AJPww AKOww AKPww AQXww ARUww Output Voltage 3.3V 3.0V 2.8V 2.5V 3.8V 3.6V 3.5V 2.7V 3.4V 2.85V 3.7V 1.5V 1.8V 2.9V 3.1V 5.0V 2.85V Package SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-26 Operating Temp. Range -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
2
Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability.
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Ordering Information
Part Number AME8812AEEV AME8812BEEV AME8812CEEV AME8812DEEV AME8812EEEV AME8812FEEV AME8812GEEV AME8812HEEV AME8812IEEV AME8812JEEV AME8812KEEV AME8812LEEV AME8812MEEV AME8812NEEV AME8812OEEV Output Voltage 3.3V 3.0V 2.8V 2.5V 3.8V 3.6V 3.5V 2.7V 3.4V 2.85V 3.7V 1.5V 1.8V 2.9V 3.1V Package SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 Operating Temp. Range -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability.
3
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Ordering Information
Part Number AME8840AEEV AME8840BEEV AME8840CEEV AME8840DEEV AME8840EEEV AME8840FEEV AME8840GEEV AME8840HEEV AME8840IEEV AME8840JEEV AME8840KEEV AME8840LEEV AME8840MEEV AME8840NEEV AME8840OEEV Marking ALCww ALDww ALEww ALFww ALGww ALHww ALIww ALJww ALKww ALLww ALMww ALNww ALOww ALPww ALQww Output Voltage 3.3V 3.0V 2.8V 2.5V 3.8V 3.6V 3.5V 2.7V 3.4V 2.85V 3.7V 1.5V 1.8V 2.9V 3.1V Package SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 Operating Temp. Range -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C -40 C to +85 C
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability.
4
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Absolute Maximum Ratings
Parameter Input Voltage Output Current Output Voltage ESD Classification Maximum 8 P D / (V IN - V O ) GND - 0.3 to V IN + 0.3 B Unit V mA V
n Recommended Operating Conditions
Parameter Ambient Temperature Range Junction Temperature Rating -40 to +85 -40 to +125 Unit
o
C C
o
n Thermal Information
Param ete r Ma x im um
o
Unit
Thermal Resistance (q ja )
SOT-25
260
C/W
Internal Power Dissipation (P D ) (DT = 100o C)
SOT-25
380
mW
Thermal Resistance (q ja )
SOT-26
260
o
C/W
Internal Power Dissipation (P D ) (DT = 100o C) Maximum Junction Temperature
SOT-26
380
mW
150
o
C
Caution: Stress above the listed absolute rating may cause permanent damage to the device
5
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Electronic Specifications
TA = 25 o C unless otherwise noted
Parameter Input Voltage Output Voltage Accuracy Symbol VIN VO IO=300mA VO=VONOM -2.0% IO=1mA 1.2V1.2V VO>1.2V VO<0.8V IO=0mA IO=1mA to 300mA IO=1mA VIN=VO+1 to VO+2 VO < 2.0V 2.0V<=VO < 4.0V 4.0V <= Vo Load Regulation Over Temerature Shutdown Over Temerature Hysterisis VO Temperature Coefficient REGLOAD OTS OTH TC f=1kHz Power Supply Rejection PSRR IO=100mA CO=2.2F f=10Hz to 100kHz IO=10mA f=10kHz f=100kHz Co=2.2F 2.0 0 IO=1mA to 300mA -0.15 -0.1 -0.4 -1 0.02 0.2 0.2 150 30 30 50 20 15 30 Vin 0.4 0.1 0.5 0.5 0 1 0.4 Vrms V V A A A V dB 300 300 450 150 30 35 0.15 0.1 0.4 1 300 50 See chart Test Condition Min Note 1 -1.5 Typ Max 7 1.5 1300 400 300 mA mA mA A A % % % %
o o
Units V %
Dropout Voltage
VDROPOUT
mV
Line Regulation
REGLINE
C C
ppm/oC
Output Voltage Noise
eN VEH VEL
EN Input Threshold
VIN=2.7V to 7V VIN=2.7V to 7V VEN=VIN, VIN=2.7V to 7V VEN=0V, VIN=2.7V to 7V VIN=5V, VO=0V, VENEN Input Bias Current Shutdown Supply Current Shutdown Output Voltage Note1:VIN(min)=VOUT+VDROPOUT
IEH IEL ISD VO,SD
6
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Detailed Description
The AME8801/8840 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds 150oC, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8801/8840 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8801/8840 also incorporates current foldback to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts. A third capacitor can be connected between the BYPASS pin and GND. This capacitor can be a low cost Polyester Film variety between the value of 0.001 ~ 0.01F. A larger capacitor improves the AC ripple rejection, but also makes the output come up slowly. This "Soft" turn-on is desirable in some applications to limit turn-on surges. All capacitors should be placed in close proximity to the pins. A "Quiet" ground termination is desirable. This can be achieved with a "Star" connection.
n Enable
The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1A. This pin behaves much like an electronic switch.
n External Capacitors
The AME8801/8840 is stable with an output capacitor to ground of 2.2F or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1F ceramic capacitor with a 10F Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1F to have a beneficial effect.
7
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
Ground Current vs. Input Voltage
45
Load Step ( 1mA-300mA)
Vo(5mV/DIV) C L =2.2F C I N =2.2F
40
Output
Ground Current (A)
35 30 25
85 O C
15 10 5 0 0 1 2 3 4 5 6 7 8
IL(200mA/DIV)
20
25 O C
IL o a d
0 TIME( 20mS/DIV) Input Voltage (V)
Chip Enable Transient Response
Enable (2V/DIV) Enable (2V/DIV)
Chip Enable Transient Response
C L =2F R L =10 C B Y P =1000pF
0
C L =2F R L =10
0
Output (1V/DIV)
0 TIME ( 1mS/DIV)
Output (1V/DIV)
0 TIME ( 1mS/DIV)
Drop Out Voltage vs Output Voltage
300
Drop Out Voltage vs Load Current
250
Drop Out Voltage (mV)
250 200 150 100
IL O A D = 1 0 0 m A IL O A D= 3 0 0 m A IL O A D = 2 0 0 m A
Dropout Voltage (mV)
200
150
Top to bottom V O U T =2.5V V O U T =2.8V V O U T =3.0V V O U T =3.3V V O U T =3.5V V O U T =3.8V
100
50
50 0 2.5 2.75 3 3.25 3.5 3.75 4
0 0 50 100 150 200 250 300
8
Output Voltage (V)
Load Current (mA)
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
Power Supply Rejection Ratio
-20 -30 -40
Power Supply Rejection Ratio
0 -10 -20 PSRR (dB)
C L =2.2F Tantalum C B Y P =0 100mA
C L =2.2F Tantalum C B Y P =1000pF
100mA 1mA
PSRR (dB)
-30 -40 -50 -60
100mA 10mA
-50 -60 -70
100mA
10mA 100A 100A
-70 -80 1.0E+01
100A
100A
1mA
-80
1.0E+01
1.0E+03
1.0E+05
1.0E+07
1.0E+03
1.0E+05
1.0E+07
Frequency (Hz)
Frequency (Hz)
Power Supply Rejection Ratio
-10 -20 -30
Power Supply Rejection Ratio
-10 -20 -30
C B Y P = 100 pF C L = 10 F Tantalum I L = 100 mA
C BYP = 0
C BYP = 0 C L = 5.6 F Ceramic I L = 100 mA C B Y P = 100 pF
PSRR ( dB)
-40 -50 -60 -70
PSRR ( dB)
-40 -50 -60 -70
C B Y P = 1 nF C B Y P = 10 nF
C B Y P = 1 nF C B Y P = 10 nF
-80 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06
-80 1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
Frequency (Hz)
Frequency (Hz)
Short Circuit Response
ILOAD (400mA/DIV) R L O A D =100 R S H O R T =0.1
Overtemperature Shutdown
I OUT (200mA/DIV)
0
R L O A D =6.6
0
VOUT (1V/DIV)
VOUT (1V/DIV)
0 TIME (2mS/DIV) TIME (0.5Sec/DIV)
0
9
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
Noise Measurement
Current Limit Response
IOUT (200mA/DIV) R L O A D =3.3
0
VOUT (1V/DIV)
0 TIME (2mS/DIV)
TIME (20mS/DIV)
Transient Line Response Safe Operating Area
VIN (1V/DIV)
Output Current (mA)
300 SOT-23-5 100
VIN DC = 5.0V CL = 2.2F
VO (1mV/DIV)
10 0.1 1.0 8.0
Vo (1mV/ DIV)
CL = 2.2F NO FILTER
TIME (2mS/DIV)
Input-Output Voltage Differential (V)
10
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
10000 1000 100
Stability vs. ESR vs I LOAD
Unstable Region
10000 1000
Stability vs. ESR vs I LOAD
Unstable Region
C L =1F
100
C L =2F Stable Region
ESR ()
10 1
ESR ()
Stable Region
10 1 0.1
0.1
Untested Region
0.01 0 50 100 150 200
0.01 0 50
Untested Region
100
150
200
ILOAD (mA)
ILOAD (mA)
Stability vs. ESR vs I LOAD
10000
Unstable Region
Stability vs. ESR vs I LOAD
10000
Unstable Region
1000 100
C L =3F
1000 100
C L =10F Stable Region
ESR ()
ESR ()
10 1 0.1 0.01
10 1 0.1
Stable Region
0.01 0 50
Untested Region
0.001 200 0 50
Untested Region
100
150
100
150
200
ILOAD (mA)
ILOAD (mA)
11
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
Quiescent Current vs.Temp.
Quiescent Current @ 5V (uA)
35 34 0.58 0.56 0.54 0.52 0.50 0.48 0.46 0.44 0.42 0.40 -45 -5 25 55 85
Load Regulation vs. Temp.
33 32 31 30 29 28 27
Load Regulation (%)
-45
-5
25
55
85
Temperature (0C)
Temperature (0C)
Shut Down Current vs. Temp.
1.0
Dropout Voltage vs. Temp.
Dropout Voltage @ 300mA (mV)
220 210 200 190 180 170 160 150 -45
Shut Down Current (uA)
0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -45 -5 25 55
0
V O U T =3V
85
Temperature ( C)
Temperature ( 0 C)
-5
25
55
85
EN Pin LO Bias Current vs. Temp.
EN pin LO bias current (uA)
-0.20 -0.25 -0.30 -0.35 -0.40 -0.45 -0.50 -45 -5 25 55
0
85
12
Temperature ( C)
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Package Dimension
SOT-25
SYMBOLS A A1 A2 b C D E e H L 1 S1 MILLIMETERS MIN MAX 1.00 1.45 0.00 0.70 0.35 0.08 2.70 0.15 1.25 0.55 0.25 3.10 INCHES MIN MAX 0.0394 0.0571 0.0000 0.0276 0.0138 0.0031 0.1063 0.0591 0.0492 0.0217 0.0098 0.1220
1.40 1.80 1.90 BSC 2.60 0.30 0 0.85
0.0551 0.0709 0.07480 BSC 0.1024 0.0118 0 0.0335
3.00 10 1.05
0.1181 10 0.0413
SOT-26
SYMBOLS A A1 A2 b C D E e H L 1 S1
MILLIMETERS MIN MAX 1.00 1.40 0.00 0.70 0.35 0.08 2.70 1.40 0.15 1.25 0.50 0.25 3.10 1.80
INCHES MIN MAX 0.0394 0.0551 0.0000 0.0276 0.0138 0.0031 0.1063 0.0551 0.0591 0.0492 0.0197 0.0098 0.1220 0.0709
1.90 BSC 2.60 3.00 0.35 0 0.85
0.0748 BSC 0.1024 0.1181 0.0138 0 0.0335
9 1.05
9 0.0413
13
www.analogmicro.com
E-Mail: info@analogmicro.com
Life Support Policy: These products of Analog Microelectronics, Inc. are not authorized for use as critical components in lifesupport devices or systems, without the express written approval of the president of Analog Microelectronics, Inc. Analog Microelectronics, 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) Analog Microelectronics, Inc. , August 2001 Document: 2006-DS8801/8812/8840-E
Corporate Headquarters
Analog Microelectronics, Inc.
3100 De La Cruz Blvd. Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489
Asia Pacific Headquarters
AME, Inc.
2F, 187 Kang-Chien Road, Nei-Hu District Taipei 114, Taiwan, R.O.C. Tel : 886 2 2627-8687 Fax : 886 2 2659-2989

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