AME, Inc.
1
AME8801 / 8812 / 8840 300mA CMOS LDO
n T ypical Application
n Functional Block Diagram
l Very Low Dropout V oltage
l Guaranteed 300mA Output
l Accurate to within 1.5%
l 30µA Quiescent Current
l Over-T emperature Shutdown
l Current Limiting
l Short Circuit Current Fold-back
l Noise Reduction Bypass Capacitor
l Power-Saving Shutdown Mode
l Space-Saving SOT-25, SOT-26 Package
l Factory Pre-set Output Voltages
l Low T emperature Coefficient
The AME8801/8812/8840 family of positive, linear regu-
lators feature low quiescent current (30µA typ.) with low
dropout voltage, making them ideal for battery applica-
tions. 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
2.2µF or greater.
l Instrumentation
l Portable Electronics
l Wireless Devices
l Cordless Phones
l PC Peripherals
l Battery Powered Widgets
l Electronic Scales
n General Description
n Features
n Applications
AME8801
AME8812
AME8840
OUTPUT
INPUT
C3
2.2µ
µµ
µF
C1
1µ
µµ
µF
GND
OUT
5V
EN
BYP
IN
C2
1000pF
AMP
GND
OUT
IN
R1
R2
Vref=1.215V
BYP
Overcurrent
Shutdown
Thermal
Shutdown
EN
AME, Inc.
2
300mA CMOS LDO
AME8801 / 8812 / 8840
n Pin Configuration
AME8801
1. VIN
2. GND
3. EN
4. BYP
5. OUT
SOT-25
Top View
SOT-25
Top View
SOT-25
Top View
SOT-26
Top View
AME8801
1. OUT_1
2. GND
3. BYP
4. EN
5. VIN
6. OUT_2
AME8812
1. EN
2. GND
3. VIN
4. OUT
5. BYP
AME8840
1. EN
2. GND
3. BYP
4. OUT
5. VIN
132
54
AME8812
132
54
AME8840
132
64
5
AME8801
132
54
AME8801
AME, Inc.
3
AME8801 / 8812 / 8840 300mA CMOS LDO
n Ordering Information
AME8812 x x x x x
Operating Temperature Range
Number of Pins
Package Type
Product Grade or Option
Special Feature
AME8801 x x x x x
AME8840 x x x x x
A: 3.3V E: -40OC to 85OCE: SOT-2X V: 5 L: Low Profile
B : 3. 0V Y : 6 Y : Lead Free & Low P rofi l e
C: 2.8V Z: Lead Free
D: 2.5V
E: 3.8V
F: 3.6V
G: 3.5V
H: 2.7V
I: 3.4V
J: 2.85V
K: 3.7V
L: 1.5V
M: 1.8V
N: 2.9V
O: 3.1V
S: 5.0V
Special Feature
Product
Grade
or Option
Operating
Te m pera ture Range Package Type Nu mb er o f
Pins
AME, Inc.
4
300mA CMOS LDO
AME8801 / 8812 / 8840
n Ordering Information
Part Number M ar ki ng O ut put Vol t age Package O per at i ng Temp. Range
AME8801AEEV AAFww 3.3V SOT-25 - 40oC to + 85oC
AME8801BEEV AAGww 3.0V SOT-25 - 40oC to + 85oC
AME8801CEEV AAHww 2.8V SOT-25 - 4 0oC to + 85oC
AME8801CEEVZ AAHww 2.8V SOT-25 - 40oC to + 85oC
AME8801DEEV AAIww 2.5V SOT-25 - 40oC to + 85oC
AME8801EEEV AAJww 3.8V SOT-25 - 40oC to + 85oC
AME8801FEEV ABOww 3.6V SOT-25 - 40oC to + 85oC
AME8801FEEVZ ABOww 3.6V SOT-25 - 40oC to + 85oC
AME8801GEEV ACFww 3.5V SOT-25 - 40oC to + 85oC
AME8801HEEV AEGww 2.7V SOT-25 - 40oC to + 85oC
AME8801IEEV AEOww 3.4V SOT-25 - 4 0oC to + 85oC
AME8801JEEV AGQww 2.85V SOT-25 - 4 0oC to + 85oC
AME8801JEEVZ AGQww 2.85V SOT-25 - 40oC to + 85oC
AME8801KEEV AHSww 3.7V SOT-25 - 4 0oC to + 85oC
AME8801LEEV AJOww 1.5V SOT-25 - 40oC to + 85oC
AME8801MEEV AJPww 1.8V SOT-25 - 4 0oC to + 85oC
AME8801NEEV AKOww 2.9V SOT-25 - 40oC to + 85oC
AME8801OEEV AKPww 3.1V SOT-25 - 40oC to + 85oC
AME8801OEEVZ AKPww 3.1V SOT-25 - 40oC to + 85oC
AME8801SEEV AQXww 5.0V SOT-25 - 4 0oC to + 85oC
AME8801JEEY ARUww 2.85V SOT-26 - 4 0oC to + 85oC
AME8812AEEV ASEww 3.3V SOT-25 - 40oC to + 85oC
AME8812BEEV ASFww 3.0V SOT-25 - 40oC to + 85oC
AME8812CEEV AUGww 2.8V SOT-25 - 40oC to + 85oC
AME8812DEEV ARSww 2.5V SOT-25 - 40oC to + 85oC
AME8812DEEVZ ARSww 2.5V SOT-25 - 40oC to + 85oC
AME8812EEEV AUHww 3.8V SOT-25 - 4 0oC to + 85oC
AME8812FEEV AUIww 3.6V SOT-25 - 40oC to + 85oC
AME8812GEEV AUJww 3.5V SOT-25 - 40oC to + 85oC
AME8812HEEV AUKww 2.7V SOT-25 - 40oC to + 85oC
AME8812IEEV AULww 3.4V SOT-25 - 40oC to + 85oC
AME, Inc.
5
AME8801 / 8812 / 8840 300mA CMOS LDO
n Ordering Information (contd.)
Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability .
Part Number M ar ki ng O ut put Vol t age Package O per at i ng Temp. Range
AME8812JEEV ARFww 2.85V SOT-25 - 4 0oC to + 85oC
AME8812JEEVZ ARFww 2.85V SOT-25 - 4 0oC to + 85oC
AME8812KEEV AUMww 3.7V SOT-25 - 40oC to + 85oC
AME8812LEEV AUNww 1.5V SOT-25 - 40oC to + 85oC
AME8812MEEV AUOww 1.8V SOT-25 - 40oC to + 85oC
AME8812MEEVZ AUOww 1.8V SOT-25 - 4 0oC to + 85oC
AME8812NEEV AUPww 2.9V SOT-25 - 40oC to + 85oC
AME8812OEEV AUQww 3.1V SOT-25 - 40oC to + 85oC
AME8812SEEV AURww 5.0V SOT-25 - 40oC to + 85oC
AME8840AEEV ALCww 3.3V SOT-25 - 40oC to + 85oC
AME8840BEEV ALDww 3.0V SOT-25 - 40oC to + 85oC
AME8840CEEV ALEww 2.8V SOT-25 - 40oC to + 85oC
AME8840DEEV ALFww 2.5V SOT-25 - 40oC to + 85oC
AME8840EEEV ALGww 3.8V SOT-25 - 4 0oC to + 85oC
AME8840FEEV ALHww 3.6V SOT-25 - 4 0oC to + 85oC
AME8840GEEV ALIww 3.5V SOT-25 - 40oC to + 85oC
AME8840HEEV ALJww 2.7V SOT-25 - 4 0oC to + 85oC
AME8840IEEV ALKww 3.4V SOT-25 - 40oC to + 85oC
AME8840JEEV ALLww 2.85V SOT-25 - 40oC to + 85oC
AME8840KEEV ALMww 3.7V SOT-25 - 40oC to + 85oC
AME8840LEEV ALNww 1.5V SOT-25 - 40oC to + 85oC
AME8840MEEV ALOww 1.8V SOT-25 - 40oC to + 85oC
AME8840NEEV ALPww 2.9V SOT-25 - 40oC to + 85oC
AME8840OEEV ALQww 3.1V SOT-25 - 40oC to + 85oC
AME, Inc.
6
300mA CMOS LDO
AME8801 / 8812 / 8840
Parameter Maximum Unit
Input V oltage 8 V
Out put Current P D / (VIN - V O)mA
Out put Volt age GND - 0. 3 t o V IN + 0.3 V
ESD Classification B
Maximum Unit
Thermal Resistance (θja)SOT-25260
oC / W
Int ern al P o wer Di s si pa t ion (P D)
(DT = 100oC) SOT-25 380 mW
Thermal Resistance (θja)SOT-26260
oC / W
Int ern al P o wer Di s si pa t ion (P D)
(DT = 100oC) SOT-26 380 mW
150 oC
M ax i m um Junc t i on Tem perat ure
Parameter
Parameter Rating Unit
A m bient Temperat ure Range - 40 to + 85 oC
Junc tion Tem perature - 40 to + 125 oC
n Absolute Maximum Ratings
n Recommended Operating Conditions
n Thermal Information
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
AME, Inc.
7
AME8801 / 8812 / 8840 300mA CMOS LDO
Parameter Symbol Min Typ Max Units
Input V oltage V IN Note 1 7 V
-1.5 1.5
-2.5 2.5
1.2V<=VO(NOM)<=2.0V 1300
2.0V<VO(NOM)<=2.8V 400
2.8V<VO(NOM) 300
Out put Current IO300 mA
Current Li m i t ILIM 300 450 mA
S hort Circuit Current, Not e2 ISC 150 300 mA
Qui es cent Current IQ30 50 µA
Ground Pi n Current IGND 35 µA
1. 2V < = V O < = 1. 4V -0. 2 0. 2
1. 4V < VO <= 2.0V -0.15 0.15
2. 0V < VO < 4. 0V -0. 1 0. 02 0. 1
4. 0V < = V o -0.4 0.2 0.4
Load Regulat i on REGLOAD -1 0.2 1 %
Over Temerat ure S hut down OTS 150 oC
Over Te m erature Hys teri sis OTH 30 oC
VO Tem perat ure Coeffi cient TC 30 ppm/oC
f=1kHz 50
f=10kHz 20 dB
f=100kHz 15
VEH 2.0 Vin V
VEL 00.4V
IEH 0.1 µA
IEL 0.5 µA
S hut down S upply Current ISD 0.5 1 µA
S hut down Out put V ol t age V O,SD 00.4V
%
IO=0.4mA, VEN<VEL
Power Supply Rejection IO=100mA
CO=2.2µF
VEN=VIN, VIN=2.7V to 7V
VEN=0V, VIN=2.7V to 7V
VIN=5V, VO=0V, VEN<VEL
Out put Vol t age Nois e eN
E N Input B i as Current
VO>1.2V
VO<0.8V
IO=0mA
IO=1mA to 300mA
IO=1mA to 300mA
PSRR
Te st Condi tion
IO=300mA
Out put Vol t age A cc urac y V OIO=1mA
µVrms
E N Input Thre shol d VIN=2.7V to 7V
VIN=2.7V to 7V
f= 10Hz to 100kHz
IO=10mA Co=2.2µF30
%
Dropout V oltage V DROPOUT IO=300mA
VO=VO(NOM) -2.0%
VO>1.2V
mV
Line Regulat i on REG LINE IO=1mA
VIN=VO+1 to VO+2
n Electrical Specifications
T A = 25OC unless otherwise noted
Note1: VIN(MIN)=VOUT+VDROPOUT
Note2: T o prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be
applied before a current source load is applied.
AME, Inc.
8
300mA CMOS LDO
AME8801 / 8812 / 8840
A third capacitor can be connected between the BY-
PASS pin and GND. This capacitor can be a low cost
Polyester Film variety between the value of 0.001 ~
0.01µF. A larger capacitor improves the AC ripple rejec-
tion, 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.
The AME8801/8812/8840 is stable with an output ca-
pacitor to ground of 2.2µF or greater . Ceramic capacitors
have the lowest ESR, and will offer the best AC perfor-
mance. Conversely, Aluminum Electrolytic capacitors
exhibit the highest ESR, resulting in the poorest AC re-
sponse. 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 in-
put and ground to stabilize Vin. The input capacitor should
be at least 0.1µF to have a beneficial effect.
n Detailed Description
n External Capacitors
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 1µA. This pin behaves
much like an electronic switch.
The AME8801/8812/8840 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 pro-
tection circuits. During normal operation, the error ampli-
fier compares the output voltage to a precision reference.
Over-current and Thermal shutdown circuits become ac-
tive when the junction temperature exceeds 150oC, or
the current exceeds 300mA. During thermal shutdown,
the output voltage remains low . Normal operation is re-
stored when the junction temperature drops below 120oC.
The AME8801/8812/8840 switches from voltage mode
to current mode when the load exceeds the rated output
current. This prevents over-stress. The AME8801/8812/
8840 also incorporates current foldback to reduce power
dissipation when the output is short circuited. This fea-
ture 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.
AME, Inc.
9
AME8801 / 8812 / 8840 300mA CMOS LDO
Ground Current vs. Input Voltage Load Step (1mA-300mA)
Chip Enable Transient Response Chip Enable Transient Response
Drop Out Voltage vs. Output V oltage Drop Out Voltage vs. Load Current
Ground Current (µ
µµ
µ
A)
Input Voltage (V)
0
5
10
15
20
25
30
35
40
45
012345678
85OC
25OC
TIME( 20mS/DIV)
CL=2.2µF
CIN =2.2µF
Output
ILoad
0
IL(200mA/DIV) VO (5mV/DIV)
0
0
Output (1V/DIV) Enable (2V/DIV)
TIME ( 1mS/D IV)
CL=2µF
RL=10Ω
CBYP=1000pF 0
0
TIME ( 1mS/DIV)
CL=2µF
RL=10Ω
Outpu t (1V/ D IV) Enable (2V/DIV)
0
50
100
150
200
250
300
2.5 2.75 3 3.25 3.5 3.75 4
Output Voltage (V)
Drop Out Voltage (mV)
ILOAD=300mA
ILOAD=200mA
ILOAD=100mA
0
50
100
150
200
250
0 50 100 150 200 250 300
Load Current (mA)
Dropout Voltage (mV)
Top to bottom
VOUT=2.5V
VOUT=2.8V
VOUT=3.0V
VOUT=3.3V
VOUT=3.5V
VOUT=3.8V
bottom
AME, Inc.
10
300mA CMOS LDO
AME8801 / 8812 / 8840
Power Supply Rejection Ratio Power Supply Rejection Ratio
Power Supply Rejection Ratio Power Supply Rejection Ratio
Short Circuit Response Overtemperature Shutdown
-80
-70
-60
-50
-40
-30
-20
10 1K 100K 10M
PSRR (dB)
Frequency (Hz)
CL=2.2µF Tanta lum
CBYP=1000pF
100mA
100µA
1mA
10mA
100mA
100µA
PSRR (dB)
100mA
10mA
1mA
100 µA
100mA
100 µA
CL=2.2µF Tantalum
CBYP=0
-80
-70
-60
-50
-40
-30
-20
-10
0
10 1K 100K
Frequency (Hz)
10M
PSRR ( dB)
Frequency (Hz)
-80
-70
-60
-50
-40
-30
-20
-10
10 100 1K 10K 100K 1M
CL = 10 µF
Tantalum
IL = 100 mA
CBYP = 0
CBYP = 100 pF
CBYP = 1 nF
CBYP = 10 nF
PSRR ( dB)
Frequency (Hz)
-80
-70
-60
-50
-40
-30
-20
-10
10 100 1K 10K 100K
CL = 5.6 µF
Ceramic
IL = 100 mA
CBYP = 0
CBYP = 100 pF
CBYP = 1 nF
CBYP = 10 nF
RLOAD =100Ω
RSHORT =0.1Ω
0
0
TIME (2mS /DIV)
Vout (1V/DIV) ILoad(400mA/DIV)
V
OUT
(1V/DIV) I
OUT
(200mA/DIV)
TIME (0.5Sec/DIV)
0
0
RLOAD=6.6 Ω
Tantalum
AME, Inc.
11
AME8801 / 8812 / 8840 300mA CMOS LDO
Current Limit Response Noise Measurement
Safe Operating Area
Line Transient Response
Stability vs. ESR vs. ILoad Stability vs. ESR vs. ILoad
TIME (2mS/DIV)
0
0
VOUT(1V/DIV) IOUT(200mA/DIV)
RLoad=3.3Ω
TIME (20ms/DIV)
Vo (1mV DIV)
CL=2.2µF
No Filter
TIME (2mS/DIV)
VO(1mV/DIV) VIN(1V/DIV)
VINDC=5.0V
CL=2.2µF
Out p ut Cu r rent (mA)
Input-Output Voltage Differential (V)
10
100
300
0.1 1.0 8.0
SOT-23-5
ESR ( Ω
ΩΩ
Ω )
ILOAD (mA)
0.01
0.1
1
10
100
1000
10000
0 50 100 150 200
Stable Region
Untested Region
Unstable Region
CL=1µF
ILOAD (mA)
ESR ( Ω
ΩΩ
Ω
)
0.01
0.1
1
10
100
1000
10000
0 50 100 150 200
Stable Region
Untested Region
Unstable Region
CL=2µF
AME, Inc.
12
300mA CMOS LDO
AME8801 / 8812 / 8840
Stability vs. ESR vs. ILoad
Stability vs. ESR vs. ILoad
Shut Down Current vs. Temp.
Quiescent Current vs. T emp. Load Regulation vs. T emp.
EN pin LO bias Current vs. T emp.
0.01
0.1
1
10
100
1000
10000
0 50 100 150 200
Stable Region
Untested Region
Unstable Region
ILOAD (mA)
ESR ( Ω
ΩΩ
Ω )
CL=3µF
0.40
0.42
0.44
0.46
0.48
0.50
0.52
0.54
0.56
0.58
-45 -5 25 55 85
Temperature (oC)
Loa d R egula tion (%)
-0.50
-0.45
-0.40
-0.35
-0.30
-0.25
-0.20
-45-5255585
Temperature (oC)
EN pin LO bias current (uA)
0.001
10000
0.01
0.1
1
10
100
1000
0 50 100 150 200
Stable Region
Untested Region
Unstable Region
CL=10µF
ILOAD (mA)
ESR ( Ω
ΩΩ
Ω )
27
28
29
30
31
32
33
34
35
-45 -5 25 55 85
Temperature (oC)
Qui escent Current @ 5V (uA)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-45-5255585
Temperature ( oC)
Shut Down Current (uA)
AME, Inc.
13
AME8801 / 8812 / 8840 300mA CMOS LDO
Dropout Voltage vs. Temp. PG VOL vs. Temp.
150
160
170
180
190
200
210
220
-45 -5 25 55 85
Temperature (oC)
Dropout Voltage @ 300mA (mV)
0.15
0.20
0.25
0.30
0.35
0.40
0.45
-45 -5 25 55 85
Temperature (oC)
PG VOL @ 0.4mA (V)
AME, Inc.
14
300mA CMOS LDO
AME8801 / 8812 / 8840
n Package Dimension
SOT-25
SOT-26
MIN MAX MIN MAX
A
A10.00 0.15 0.0000 0.0059
b0.30 0.55 0.0118 0.0217
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.60 3.00 0.10236 0.11811
L
è1 0o10o0o10o
S1
1.90 B SC 0.07480 B SC
SYMBOLS MILLIMETERS INCHES
1.20REF 0.0472REF
0.37BSC 0.0146BSC
0.95BSC 0.0374BSC
MIN MAX MIN MAX
A
A10.00 0.15 0.0000 0.0059
b0.30 0.55 0.0118 0.0217
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.60 3.00 0.10236 0.11811
L
è1 0o10o0o10o
S1
0.37REF 0.0146REF
0.95REF 0.0374REF
1.90 B S C 0.0748 B S C
SYMBOLS MILLIMETERS INCHES
1.20REF 0.0472REF
L
Top View Side View
Fron t Vie w
£c1
D
S1
e
E
H
A1
b
A
Side View
L
£c1
Top View
S1
D
e
E
H
Front View
b
A
A1
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.
AME, Inc. , November 2003
Document: 2006-DS8801/8812/8840-K
Corporate Headquarter U.S.A. (Subsidiary)
AME, Inc. Analog Microelectronics, Inc.
2F, 189 Kang-Chien Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201
Taipei 114, Taiwan, R.O.C. Santa Clara, CA. 95054-2046
Tel : 886 2 2627-8687 Tel : (408) 988-2388
Fax: 886 2 2659-2989 Fax: (408) 988-2489
www.ame.com.tw
E-Mail: sales@ame.com.tw
