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Part: AME8802FEEV
Category:
Description: Output Voltage: 3.6V; 300mA CMOS LDO
Company: Analog Micro
Datasheet: Download AME8802FEEV datasheet File size : 151 kB
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AME, Inc.
AME8802
300mA CMOS LDO
! General Description
The AME8802 family of positive, linear regulators feature low quiescent current (30µA 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. An additional feature is a "Power Good" detector, which pulls low when the output is out of regulation. The AME8802 is stable with an output capacitance of 2.2µF or greater.
! Functional Block Diagram
IN
Overcurrent Shutdown
OUT
Thermal Shutdown
EN Vref x110% PG
R1
AMP
R2 Vref x90% Vref =1.215V GND
! Features
" " " " " " " " " " " " Very Low Dropout Voltage Guaranteed 300mA Output Accurate to within 1.5% 30µA Quiescent Current Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Power Good Output Function Power-Saving Shutdown Mode Space-Saving SOT-25 (SOT-23-5) Factory Pre-set Output Voltages Low Temperature Coefficient
Note: If output voltage specification is lower than 1.215V, Vref will be trimmed to 1.2V t r i m m e d to 1.2V.
! Typical Application
INPUT
IN
OUT
OUTPUT
AME8802
PG GND EN
5V
C1 1µF
C2 2.2µF
! Applications
" " " " " " " Instrumentation Portable Electronics Wireless Devices Cordless Phones PC Peripherals Battery Powered Widgets Electronic Scales
1
AME, Inc.
AME8802
300mA CMOS LDO
! Pin Configuration
SOT-25 Top View
5 4
AME8802
1 2 3
AME8802 1. VIN 2. GND 3. EN 4. PG 5. VOUT
! Ordering Information
Part Number
AME8802AEEV AME8802BEEV AME8802CEEV AME8802DEEV AME8802EEEV AME8802FEEV AME8802GEE V AME8802HEEV AME8802IEEV AME8802JEE V AME8802KEEV AME8802LE EV AME8802ME EV AME8802NEEV AME8802OEE V AME8802TE EV AME8802UEEV
Marking
AAK ww AALww AAMww AANww AAOww ABP ww ACGww AEHww AEP ww AGRww AHTww AJMww AJNww AKQww AKRww ARV ww ASDww
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 1.2V 3.2V
P ackag e
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-25
Operating Temp. Range
- 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC
Note: ww represents the date code Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability.
2
AME, Inc.
AME8802
300mA CMOS LDO
! Absolute Maximum Ratings
Parameter
Input Voltage Output Current Output Voltage ESD Classification
Maximum
8 PD / (VI N - VO) GND - 0.3 to VI N + 0.3 B
Unit
V mA V
Caution: Stress above the listed absolute rating may cause permanent damage to the device
! Recommended Operating Conditions
P arameter
Ambient Temperature Range Junc tion Temperature
R atin g
- 40 to + 85 - 40 to + 125
U nit
o o
C C
! Thermal Information
Parameter
Thermal Resistance (ja) Internal Power Dissipation (PD ) ( T = 100oC) Max imum Junction Temperature Max imum Lead Temperature (10 Sec) SOT-25 SOT-25
Maximum
260 380 150 300
Unit
o
C/W mW
o o
C C
3
AME, Inc.
AME8802
300mA CMOS LDO
! Electrical Specifications
TA = 25OC unless otherwise noted
Pa ra me te r Input Voltage Output Voltage Accuracy Dropout Voltage Output Current Current Limit Short Circuit Current Quiesc ent Current Ground Pin Current Line Regulation Load Regulation Over Temerature Shutdown Over Temerature Hysterisis VO Temperature Coefficient Power Supply Rejection Symbol VI N VO VD ROPOU T IO ILI M ISC IQ IGND REGLI N E REGLOAD OTS OTH TC PSRR IO=100mA CO=2.2µF f=10Hz to 100kHz IO=10mA f=1k Hz f=10k Hz f=100kHz Co=2.2µF 2.0 0 IO=1mA VI N=VO+1 to VO+2 IO=300mA VO=VO(N OM) -2.0% IO=1mA 1.2V o o
Units V % mV
VO>1.2V VO>1.2V VO<0.8V IO=0mA IO=1mA to 300mA
IO=1mA to 300mA
C C
ppm/oC
Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current Shutdown Output Voltage Output Under Voltage Output Over Voltage PG Leakage Current PG Voltage Rating PG Voltage Low
eN VEH VEL IEH IEL ISD VO,SD VU V VOV ILC VPG VOL
VI N =2.7V to 7V VI N =2.7V to 7V V EN =VI N, VI N =2.7V to 7V VEN =0V, VI N=2.7V to 7V VI N =5V, VO=0V, VEN
Note1:VIN(min)=VOUT+VDROPOUT
4
AME, Inc.
AME8802
300mA CMOS LDO
! Detailed Description
The AME8802 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown, and power good function. 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 AME8802 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8802 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.
! 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 1µA. This pin behaves much like an electronic switch.
! Power Good
The AME8802 includes the Power Good feature. When the output is not within ±15% of the specified voltage, it pulls low. This can occur under the following conditions: 1) 2) 3) 4) Input Voltage too low. During Over-Temperature. During Over-Current. If output is pulled up.
(Note: PG pin is an open-drain output.)
! External Capacitors
The AME8802 is stable with an output capacitor to ground of 2.2µF 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 0.1µF ceramic capacitor with a 10µF 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 0.1µF to have a beneficial effect. 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.
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