The AME8804 family of positive, linear regulators feature low ground current (35µA typ.) with low dropout voltage, making them ideal for battery applications. The
space-saving SOT-26/TSOT-26 and SOT-25/TSOT-25
packages are 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" operating conditions.
The SOT-26/TSOT-26 version also features a "Power
Good" detector, which pulls low when the output is out of
regulation.
The AME8804 is stable with an output capacitance of
2.2µF or greater.
n Features
l Very Low Dropout Voltage
l Guaranteed 300mA Output
l Accurate to within 1.5%
l Typical 35µA Ground Current
l Over-Temperature Shutdown
l Current Limiting
l Short Circuit Current Fold-back
l Power Good Detector (6 pin version only)
l Power-Saving Shutdown Mode
l Space-Saving SOT-26/TSOT-26 and SOT-25
/ TSOT-25
l Adjustable Output Voltages
l Low Temperature Coefficient
l All AME' s Lead Free Products Meet RoHS
Standards
n Functional Block Diagram
Overcurrent
Shutdown
Thermal
Shutdown
EN
V
x110%
PG
ref
V
x90%
ref
V
AMP
ref
=1.215V
n Typical Application
GND
OUT
R1
R2
IN
5V
EN
IN
AME8804
PGADJ
C1
1µF
C2
100p
OUTIN
ADJ
GND
OUT
C3
2.2µF
n Applications
l Instrumentation
l Portable Electronics
l Wireless Devices
l Cordless Phones
l PC Peripherals
l Battery Powered Widgets
l Electronic Scales
Rev.K.04
V
= 1.215 (R1 +R2)/R2
OUT
C2 is unnecessary when R1 or R2 < 20K
PG pin is only available in the SOT-26 package option
1
AME
n Pin Configuration
300mA CMOS LDOAME8804
SOT-26/TSOT-26
Top View
645
AME8804
132
SOT-25 /TSOT-25
Top View
54
AME8804
132
AME8804AEEY
1. IN
2. GND
3. EN
4. PG
5. ADJ
6. OUT
* Die Attach:
Non-Conductive Epoxy
AME8804BEEVADJ
1. EN
2. GND
3. IN
4. OUT
5. ADJ
SOT-25 /TSOT-25
Top View
54
AME8804
132
AME8804AEEV
1. IN
2. GND
3. EN
4. ADJ
5. OUT
* Die Attach:
Conductive Epoxy
n Pin Description
Pin NamePin Description
IN
GNDGround connection pin.
EN
PG
OUT
ADJFeedback output voltage for adjustable device.
2
* Die Attach:
Conductive Epoxy
Input voltage pin.
It should be decoupled with 1µF or greater capacitor.
Enable pin.
When pulled low, the PMOS pass transistor turns off, current consuming less than
1µA.
Power-Good output.
This open-drain output is low when OUT is out of regulation.
LDO voltage regulator output pin.
It should be decoupled with a 1µF or greater value low ESR ceramic capacitor.
Rev.K.04
AME
A:
ADJ
E:
-40OC to +85
O
C
E:
SOT-2X
V:5L:
Low Profile
Y:6Y:
Lead Free & Low Profile
Z:
Lead Free
AME8804300mA CMOS LDO
n Ordering Information
AME8804 x x xx x
Special Feature
Number of Pins
Package Type
Operating Ambient Temperature Range
Product Grade or Option
Product Grade
or Option
Operating Ambient
Temperature Range
Package Type
n Ordering Information
Part NumberMarking*Output VoltagePackage
AME8804AEEYAAUwwAdjustableSOT-26
AME8804AEEYLAAUwwAdjustableTSOT-26
AME8804AEEYYAAUwwAdjustableTSOT-26
AME8804AEEYZAAUwwAdjustableSOT-26
AME8804AEEVAJCwwAdjustableSOT-25
Number of
Pins
Special Feature
Operating Ambient
Temperature Range
- 40oC to +85oC
- 40oC to +85oC
- 40oC to +85oC
- 40oC to +85oC
- 40oC to +85oC
AME8804AEEVLAJCwwAdjustableTSOT-25
AME8804AEEVYAJCwwAdjustableTSOT-25
AME8804AEEVZAJCwwAdjustableSOT-25
Note: ww represents the date code and pls refer to Date Code Rule on Package Dimension.
* A line on top of the first letter represents lead free plating such as AAUww
Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability.
Rev.K.04
- 40oC to +85oC
- 40oC to +85oC
- 40oC to +85oC
3
AME
B:
1. EN
E:
-40OC to +85
O
C
E:
SOT-2X
V:5ADJ:
Adjustable
Z:
Lead Free
2. GND
Y:
3. IN
4. OUT
Lead Free &
Low Profile
n Ordering Information (contd.)
AME8804 x x xx xxx x
300mA CMOS LDOAME8804
Special Feature
Output Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Pin
Configuration
(SOT-25)
(TSOT-25)
5. ADJ
Operating Ambient
Temperature Range
Package
Type
Number
of
Pins
Output VoltageSpecial Feature
n Ordering Information
Part NumberMarking*Output VoltagePackage
AME8804BEEVADJZBJIwwAdjustableSOT-25
AME8804BEEVADJYBJIwwAdjustableTSOT-25
Note: ww represents the date code and pls refer to Date Code Rule on Package Dimension.
* A line on top of the first letter represents lead free plating such as BJIww
Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability.
Operating Ambient
Temperature Range
- 40oC to +85oC
- 40oC to +85oC
4
Rev.K.04
AME
TSOT-25
TSOT-25
TSOT-25
AME8804300mA CMOS LDO
n Absolute Maximum Ratings
ParameterMaximumUnit
Input Voltage-0.3 to +8V
EN Voltage-0.3 to +8V
Output Voltage-0.3 to V
PG Voltage-0.3 to V
Output CurrentPD / (VIN - V
ESD Classification
+ 0.3V
IN
+ 0.3V
IN
)mA
OUT
B*
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
* HBM B:2000V~3999V
n Recommended Operating Conditions
ParameterSymbolRatingUnit
Ambient Temperature Range
Junction Temperature Range
Storage Temperature Range
T
A
T
J
T
STG
- 40 to +85
- 40 to +125
- 65 to +150
n Thermal Information
ParameterPackageDie AttachSymbolMaximumUnit
SOT-25
Thermal Resistance*
(Junction to Case)
SOT-26
TSOT-26
SOT-25
Thermal Resistance
(Junction to Ambient)
SOT-26
TSOT-26
SOT-25
Internal Power DissipationP
SOT-26
TSOT-26
Maximum Junction Temperature
Conductive Epoxy81
θ
Non-Conductive
Epoxy
JC
140
Conductive Epoxy260
θ
Non-Conductive
Epoxy
JA
280
Conductive Epoxy400
Non-Conductive
Epoxy
D
400
150
o
C
o
C
o
C
o
C / W
mW
o
C
Solder Iron (10 Sec)**
* Measure θJC on center of molding compound if IC has no tab.
** MIL-STD-202G 210F
Rev.K.04
350
o
C
5
AME
IN
O
O(NOM)
DROPOUT
O(NOM)
O(NOM)
O
LIM
SC
GND
LOAD
ADJ
REF
EH
EL
EH
EL
SD
SD
UV
O(NOM)
OV
O(NOM)
LC
PG
OL
SINK
n Electrical Specifications
TA = 25OC, VIN=5V unless otherwise noted
300mA CMOS LDOAME8804
ParameterSymbolMinTyp MaxUnits
Input Voltage
Output Voltage Accuracy
Dropout Voltage
V
V
V
Output Current
Current Limit
Short Circuit Current, Note2
Ground Pin Current
I
I
I
Line Regulation REG
Load Regulation
REG
I
IO=300mA
VO=V
IO=5mA
LINE
VIN=VO+1 to VO+2
Test Condition
IO=1mA
-2.0%
O(NOM)
VO>1.2V
VO>1.2V
VO<0.8V
IO=1mA to 300mA
IO=1mA to 300mA
1.5V<V
2.0V<V
2.8V<V
VO < 2.0V
VO >= 2.0V
<=2.0V
<=2.8V
<3.8V
Note 17V
-1.51.5%
See
chart
300mA
300450mA
150300mA
35µA
0.020.1%
0.21%
Over Temperature Shutdown OTS150
Over Temperature Hysterisis OTH30
VO Temperature Coefficient
Power Supply Rejection
TC30
PSRRf=1kHz50dB
CO=2.2µF
IO=100mA
f=100Hz60
f=10kHz20
f=10Hz to 100kHz
Output Voltage Noise eN
ADJ Input Bias Current
ADJ Reference Voltage
EN Input Threshold
I
V
V
V
EN Input Bias Current
I
I
Shutdown Supply Current
Shutdown Output Voltage
Output Under Voltage
Output Over Voltage
PG Leakage Current
PG Voltage Rating
PG Voltage Low
I
VO,
V
V
I
V
V
IO=10mA,C
VEN=VIN, VIN=2.7V to 7V
VEN=0V, VIN=2.7V to 7V
VIN=5V, VO=0V, VEN<V
=0µF
BYP
VIN=2.7V to 7V
VIN=2.7V to 7V
IO=35µA,VEN<V
VPG=7V
VO in regulation
=0.4mA
Co=2.2µF30
1.2 1.215 1.23V
2.0VinV
00.4V
EL
EL
0.51µA
00.1V
115
1µA
1300
400
mV
300
0.15%
ppm/oC
µVrms
0.1µA
0.5µA
85
%V
%V
1µA
7V
0.4VI
o
C
o
C
Note1: V
IN(MIN)=VOUT+VDROPOUT
Note2: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be
applied before a current source load is applied.
6
Rev.K.04
AME
AME8804300mA CMOS LDO
n Detailed Description
The AME8804 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error amplifier,
over-current protection, thermal shutdown, and Power
Good detection circuitry.
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 AME8804 switches from voltage mode to current
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8804 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.
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.
n Power Good
The AME8804 (SOT-26/TSOT-26 package only) includes
the Power Good feature. When the output is not within
+10% of the specified voltage, it pulls low. This can occur
under the following conditions:
1) Input Voltage too low.
2) During Over-Temperature.
3) During Over-Current.
4) If output is pulled up.
(Note: PG pin is an open-drain output.)
n External Capacitors
The AME8804 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 ca-
pacitor 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.
Rev.K.04
7
AME
300mA CMOS LDOAME8804
Ground Current vs. Input Voltage Load Step (1mA-300mA)
45
40
35
30
25
20
15
Ground Current (µ A)
10
5
0
012345678
85
25
O
C
O
C
Input Voltage (V)
Power Supply Rejection RatioChip Enable Transient Response
0
(5mV/DIV)
O
(200mA/DIV)V
L
I
I
Output
Load
TIME(20mS/DIV)
C
L =2.2µF
C
=2.2µF
IN
0
-10
CL=2.2µF Tantalum
-20
-30
-40
-50
PSRR (dB)
100mA
-60
-70
-80
101K100K
C
BYP
100 µ
Tantalum
=0
A
Frequency (Hz)
100 µA
100mA
10mA
1mA
10M
Output (1V/DIV) Enable (2V/DIV)
TIME (1mS/DIV)
CL=2µF
RL=10Ω
Drop Out Voltage vs. Output VoltageDrop Out Voltage vs. Load Current
Note: Small load (greater than 2 mA) is necessary as R1 or R2 is larger than 50 Kohm. Otherwise, output
voltage probably cannot be pulled down to 0 V on disable mode.