AME AME8847AEGT180Z 800ma cmos ldo Datasheet

AME, Inc.
800mA CMOS LDO
AME8847
n General Description
The AME8847 of positive, linear regulators feature low
quiescent current (30µA typ.) with low dropout voltage,
making them ideal for battery applications. The spacesaving SOT-223 & SOT-89 packages are attractive for
"Pocket" and "Hand Held" applications.
n Functional Block Diagram
IN
OUT
Overcurrent
Shutdown
These rugged devices have both thermal shutdown, and
current fold-back to prevent device failure under the "Worst"
operating conditions.
R1
Thermal
Shutdown
The AME8847 is stable with an output capacitance of
2.2µF or greater.
AMP
Vref=1.215V
n Features
R2
GND
l Very Low Dropout Voltage
l Guaranteed 800mA Output
l Accurate to within +1.5%
l 30µA Quiescent Current
l Over-Temperature Shutdown
n Typical Application
l Current Limiting
l Short Circuit Current Fold-back
l Space-Saving SOT-223 & SOT-89 Packages
IN
IN
l Factory Pre-set Output Voltages
l Low Temperature Coefficient
l All AME's Lead Free Products Meet RoHS
Standards
AME8847 OUT
OUT
GND
5V
C1
C2
1µF
2.2µF
n Applications
l Instrumentation
l Portable Electronics
l Wireless Devices
l Cordless Phones
l PC Peripherals
l Battery Powered Widgets
Rev.A.01
1
AME, Inc.
800mA CMOS LDO
AME8847
n Pin Configuration
SOT-223
Top View
SOT-89
Top View
AME8847
1
2
3
AME8847AEGT
1. GND
2. OUT (TAB)
3. IN
AME8847
* Die Attach:
Non-Conductive Epoxy
1
2
3
AME8847AEFT
1. GND
2. IN (TAB)
3. OUT
* Die Attach:
Non-Conductive Epoxy
n Ordering Information
AME8847 x x x x xxx x
Special Feature
Output Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Pin
Configuration
A: 1. GND
2. IN
3. OUT
(SOT-89)
Operating Ambient
Temperature
Range
E: -40OC to 85OC
Package
Type
F: SOT-89
G: SOT-223
Number
of
Pins
T: 3
Output
Voltage
180: V=1.8V
250: V=2.5V
330: V=3.3V
Special Feature
Z: Lead Free
A: 1. GND
2. OUT
3. IN
(SOT-223)
2
Rev.A.01
AME, Inc.
800mA CMOS LDO
AME8847
n Ordering Information
Part Number
Marking*
Output Voltage
Package
Operating Ambient
Temperature Range
AME8847AEFT180Z
A8847
A18ww
1.8V
SOT-89
- 40oC to 85oC
AME8847AEGT180Z
BHIyww
1.8V
SOT-223
- 40oC to 85oC
AME8847AEFT250Z
A8847
A25ww
2.5V
SOT-89
- 40oC to 85oC
AME8847AEGT250Z
BHJyww
2.5V
SOT-223
- 40oC to 85oC
AME8847AEFT330Z
A8847
A33ww
3.3V
SOT-89
- 40oC to 85oC
AME8847AEGT330Z
BFWyww
3.3V
SOT-223
- 40oC to 85oC
Note: ww & yww represents the date code pls refer to Date Code Rule on Package Dimension.
* A line on top of the first letter represents lead free plating such as A8847
Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability.
Rev.A.01
3
AME, Inc.
800mA CMOS LDO
AME8847
n Absolute Maximum Ratings
Parameter
Maximum
Unit
Input Voltage
8
V
Output Current
1
A
GND - 0.3 to V IN + 0.3
V
Input, Output Voltage
B*
ESD Classification
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
*HBM B:2000V~3999V
n Recommended Operating Conditions
Parameter
Symbol
Rating
Unit
Ambient Temperature Range
TA
- 40 to 85
o
Junction Temperature Range
TJ
- 40 to 125
o
Storage Temperature Range
TSTG
- 65 to 150
o
C
C
C
n Thermal Information
Parameter
Thermal Resistance*
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Package
Die Attach
Symbol
SOT-89
Maximum
46
θJC
SOT-223
SOT-89
SOT-223
o
C/W
31
Non-Conductive
Epoxy
180
θJA
o
C/W
135
SOT-89
Internal Power Dissipation
550
PD
SOT-223
Solder Iron(10 Sec)**
Unit
mW
800
350
o
C
* Measure θJC on backside center of tab.
** MIL-STD-202G 210F
4
Rev.A.01
AME, Inc.
800mA CMOS LDO
AME8847
n Electrical Specifications
TA = 25OC unless otherwise noted
Parameter
Input Voltage
VIN
Output Voltage Accuracy
VOUT
Dropout Voltage
Test Condition
Symbol
VDROP
Min
IOUT = 1mA
Note 1
7
V
-1.5
1.5
%
1.8V <= VOUT(NOM) <= 2.0V
IOUT = 800mA
VOUT = VOUT(NOM) - 2.0%
Typ Max Units
1400
See
1000
chart
800
2.0V < VOUT(NOM) <= 2.8V
2.8V < VOUT(NOM)
mV
Output Current
IOUT
VOUT >= 1.8V
800
mA
Output Current Limit
ILIM
VOUT >= 1.8V
900
mA
Output Short Circuit Current
ISC
VOUT < 0.8V
400
800
mA
Quiescent Current
IQ
IOUT = 0mA
30
50
µA
Ground Pin Current
IGND
IOUT = 1mA to 800mA
35
Output Voltage Line
Regulation
Output Voltage Load
Regulation
REGLINE
REGLOAD
IOUT = 1mA
VIN = VOUT + 1 to VOUT + 2
µA
1.8V <= VOUT <= 2.0V
-0.15
2.0V < VOUT < 4.0V
-0.1
0.02
0.1
VOUT >= 4.0V
-0.4
0.2
0.4
0.2
1
IOUT = 1mA to 800mA
0.15
%
%
Thermal Shutdown
Temperature
TSHDN
150
o
Temperature Hysterisis
THYS
30
o
TC
30
Output Voltage Temperature
Coefficient
Power Supply Ripple
Rejection
Output Voltage Noise
PSRR
eN
IOUT = 100mA
COUT = 2.2µF
f = 10Hz to 100KHz
IOUT = 10mA
f = 100Hz
60
f = 1KHz
50
f = 10KHz
20
COUT = 2.2µF
30
C
C
ppm/oC
dB
µVrms
Note1: VIN(MIN) = VOUT + VDROP
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.
Rev.A.01
5
AME, Inc.
AME8847
800mA CMOS LDO
n Detailed Description
n External Capacitors
The AME8847 of CMOS regulators contains a PMOS
pass transistor, voltage reference, error amplifier, overcurrent protection, and thermal shutdown.
The AME8847 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.
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 900mA. During thermal shutdown,
the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC.
The AME8847 switches from voltage mode to current
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8847 also incorporates current foldback to reduce power dissipation when
the output is short circuited. This feature becomes active
when the output drops below 0.8 volts, and reduces the
current flow by 65%. Full current is restored when the
voltage exceeds 0.8 volts.
6
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.A.01
AME, Inc.
800mA CMOS LDO
AME8847
Ground Current vs. Input Voltage
Load Step (1mA-800mA)
VOUT (10mV/DIV)
45
O
85 C
35
30
25
O
25 C
20
15
10
5
0
0
1
2
3
4
5
COUT = 2.2µF
CIN = 2.2µF
VOUT
IOUT (500mA/DIV)
Ground Current (µA)
40
6
7
I OUT
Time (20mS/DIV)
8
Input Voltage (V)
Dropout Voltage vs. Output Voltage
Power Supply Ripple Rejection Ratio
0
Top to Bottom
IOUT = 800mA
IOUT = 700mA
IOUT = 600mA
IOUT = 500mA
IOUT = 400mA
IOUT = 300mA
IOUT = 200mA
IOUT = 100mA
1000
800
600
-10
100mA
-30
-40
-50
400
-60
200
-70
2.5
3.3
4
100 µ A
1K
100 µ A
1mA
100K
Frequency (Hz)
Line Transient Response
Noise Measurement
VIN = 5.0V
COUT = 2.2µF
Time (2mS/DIV)
Rev.A.01
5
-80
10
10mA
100mA
Output Voltage (V)
VOUT (1mV/DIV)
VIN (1V/DIV)
0
1.8
COUT = 2.2µF Tantalum
-20
PSRR (dB)
1200
VOUT (1mV/DIV)
Dropout Voltage (mV)
1400
10M
COUT = 2.2µF
No Filter
Time (20ms/DIV)
7
AME, Inc.
800mA CMOS LDO
AME8847
COUT = 2.2µF
CIN = 1.0µF
VOUT(NOM) = 3.3V
Time (2mS/DIV)
8
Short Circuit Response
VOUT (1V/DIV) IOUT (500mV/DIV)
IOUT (500mA/DIV) VOUT (1V/DIV)
Current Limit Response
COUT = 2.2µF
CIN = 1µF
RLOAD < 100mΩ
Time (2mS/DIV)
Rev.A.01
AME, Inc.
800mA CMOS LDO
AME8847
n Date Code Rule
Marking
Date Code
Year
A
A
A
W
W
xxx0
A
A
A
W
W
xxx1
A
A
A
W
W
xxx2
A
A
A
W
W
xxx3
A
A
A
W
W
xxx4
A
A
A
W
W
xxx5
A
A
A
W
W
xxx6
A
A
A
W
W
xxx7
A
A
A
W
W
xxx8
A
A
A
W
W
xxx9
n Tape and Reel Dimension
SOT-89
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
Rev.A.01
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT-89
12.0±0.1 mm
4.0±0.1 mm
1000pcs
180±1 mm
9
AME, Inc.
800mA CMOS LDO
AME8847
n Tape and Reel Dimension
SOT-223
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
10
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT-223
12.0±0.1 mm
4.0±0.1 mm
2500pcs
330±1 mm
Rev.A.01
AME, Inc.
800mA CMOS LDO
AME8847
n Package Dimension
SOT-223
Top View
Side View
D
B1
SYMBOLS
θ
C
13o(4X)
H
E
e
MILLIMETERS
MIN
MAX
MIN
MAX
A1
0.01
0.10
0.0004
0.0039
B
0.60
0.84
0.0236
0.0330
B1
2.90
3.15
0.1140
0.1240
C
0.24
0.38
0.0094
0.0150
D
6.30
6.71
0.2480
0.2640
E
3.30
3.71
0.1299
0.1460
2.30 BSC
e
Front View
13o(4X)
F
A1
0.0906 BSC
F
1.40
1.80
0.0551
0.0709
H
6.70
7.30
0.2638
0.2874
θ
B
INCHES
0
o
10
o
0
o
10 o
SOT-89
Side View
Top View
SYMBOLS
D
D1
H
POLISH
A
A1
E
A1
C
S1
e
Front View
MILLIMETERS
MIN
MAX
1.39
1.60
0.8REF
INCHES
MIN
MAX
0.05472 0.06299
0.0315REF
C
0.35
0.44
0.01378 0.01732
D
4.39
4.60
0.17283
D1
1.35
1.83
0.05315 0.07205
E
2.28
3.60
0.08976 0.14173
0.1811
e
3.00REF
0.1181REF
H
0.70REF
0.0276REF
S1
1.50REF
0.0590REF
MATTE FINISH
A
POLISH
Rev.A.01
11
www.ame.com.tw
E-Mail: [email protected]
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. , July 2007
Document: 2095-DS8847-A.01
Corporate Headquarter
U.S.A. (Subsidiary)
AME, Inc.
Analog Microelectronics, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District
3100 De La Cruz Blvd., Suite 201
Taipei 114, Taiwan.
Tel : 886 2 2627-8687
Santa Clara, CA. 95054-2046
Tel: (408) 988-2388
Fax: 886 2 2659-2989
Fax: (408) 988-2489
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