AME
AME8831
n
General Description
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
n
Applications
l
Instrumentation
l
Portable Electronics
l
Wireless Devices
l
Cordless Phones
l
PC Peripherals
l
Battery Powered Widgets
l
Electronic Scales
The AME8831 family of positive, linear regulators fea-
ture low quiescent current (17µA typ.) with low dropout
voltage, making them ideal for battery applications. The
space-saving SOT-25 package is attractive for
“
Pocket”
and
“
Hand Held” applications.
These rugged devices have both Thermal Shutdown,
and Current limitation to prevent device failure under the
“
Worst” of operating conditions. In applications requires
a low noise regulated supply. The AME8831 family uses
the SR pin to program the output voltage’ s slew rate to
control the in-rush current. This is specifically used in
the USB application where large load capacitance is
present at start-up.
The AME8831 also features a logic-enabled sleep mode
to shutdown the regulator, reducing quiescent current to
1µA typical at T
A
= 25
o
C.
The AME8831 is stable with an output capacitance of
4.7µF or larger.
n
Function Block Diagram
V
IN
* ENB or EN
10 k
AMP
V
ref
GND
R2
SR
Current Limit
/ Thermal
Protection
R1
V
OUT
* AME8831A: ENB, AME8831B: EN
n
Features
l
Guaranteed 150mA Output
l
Dropout Voltage Typically 150 mV at 150 mA
l
17µA Quiescent Current
l
Over-Temperature Shutdown
l
Over-Current Limitation
l
Noise Reduction Bypass Capacitor
l
Power-Saving Shutdown Mode
l
Space-Saving SOT-25 Package
l
Factory Pre-set Output Voltages
l
Enable pin option
l
ENB active low enable
l
EN active high enable
l
All AME's Lead Free Products Meet RoHS
Standards
n
Typical Application
V
IN
1µF
IN
SR
AME8831A
ENB
GND
OUT
0.01µF
+
4.7µF
V
IN
1µF
IN
SR
AME8831B
EN
GND
OUT
0.01µF
+
4.7µF
Rev.H.05
1
AME
AME8831
n
Pin Configuration
SOT-25
Top View
5
4
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
SOT-25
Top View
AME8831A
1. IN
2. GND
5
4
AME8831B
1. IN
2. GND
AME8831
3. ENB
4. SR
5. OUT
AME8831
3. EN
4. SR
5. OUT
1
2
3
* Die Attach:
Conductive Epoxy
1
2
3
* Die Attach:
Conductive Epoxy
n
Pin Description
Pin Number
1
2
Pin Name
IN
GND
Pin Description
Input voltage pin.
It should be decoupled with 1µF or greater capacitor.
Ground connection pin.
Enable pin.
When pulled low, the PMOS pass transistor turns off, current
consuming less than 1µA.
Enable bar pin.
When pulled high, the PMOS pass transistor turns off, current
consuming less than 1µA.
The SR(Slew Rate) terminal is used to control the V
OUT
in-rush
current.
LDO voltage regulator output pin.
It should be decoupled with a 1µF or greater value low ESR
ceramic capacitor.
EN
3
ENB
4
SR
5
OUT
2
Rev.H.05
AME
AME8831
n
Ordering Information
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831 x x x x xxx x
Special Feature
Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Operating Ambient
Temperature
Range
E: -40
O
C to +85
O
C
Number
of
Pins
V: 5
Pin
Configuration
Package Type
Output
Voltage
Special Feature
A: 1. IN
(SOT-25)
2. GND
3. ENB
4. SR
5. OUT
B: 1. IN
(SOT-25)
2. GND
3. EN
4. SR
5. OUT
E: SOT-2X
180:
250:
285:
300:
330:
V=1.8V
V=2.5V
V=2.85V
V=3.0V
V=3.3V
Y: Lead free & Low profile
Z: Lead free
Rev.H.05
3
AME
AME8831
n
Ordering Information
Part Number
AME8831AEEV180Z
AME8831AEEV180Y
AME8831AEEV250Z
AME8831AEEV250Y
AME8831AEEV285Z
AME8831AEEV285Y
AME8831AEEV300Z
AME8831AEEV300Y
AME8831AEEV330Z
AME8831AEEV330Y
AME8831BEEV180Z
AME8831BEEV180Y
AME8831BEEV250Z
AME8831BEEV250Y
AME8831BEEV285Z
AME8831BEEV285Y
AME8831BEEV300Z
AME8831BEEV300Y
AME8831BEEV330Z
AME8831BEEV330Y
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
Marking*
BIKww
BIKww
BILww
BILww
BIHww
BIHww
BIMww
BIMww
BDVww
BDVww
BEYww
BEYww
BFJww
BFJww
BEZww
BEZww
BFAww
BFAww
BFBww
BFBww
Output Voltage
1.8V
1.8V
2.5V
2.5V
2.85V
2.85V
3.0V
3.0V
3.3V
3.3V
1.8V
1.8V
2.5V
2.5V
2.85V
2.85V
3.0V
3.0V
3.3V
3.3V
Package
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
SOT-25
TSOT-25
Operating Ambient
Temperature Range
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
Note: ww represents the date code and pls refer to the Date Code Rule before Package Dimension.
* A line on top of the first character represents lead free plating such as BDVww.
Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability.
4
Rev.H.05
AME
AME8831
n
Absolute Maximum Ratings
Parameter
Input Voltage
Output Current
Output Voltage
ESD Classification
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
Maximum
6
P
D
/ (V
IN
- V
OUT
)
GND-0.3 to V
IN
+0.3
C*
Unit
V
mA
V
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
*HBM C: 4000V+
n
Recommended Operating Conditions
Parameter
Ambient Temperature Range
Junction Temperature Range
Storage Temperature Range
Symbol
T
A
T
J
T
STG
Rating
- 40 to +85
- 40 to +125
-65 to +150
Unit
o
C
n
Thermal Information
Parameter
Thermal Resistance*
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Internal Power Dissipation
Maximum Junction Temperature
Solder Iron (10 Sec)**
SOT-25
Conductive Epoxy
Package
Die Attach
Symbol
θ
JC
θ
JA
P
D
Maximum
81
Unit
o
C/W
260
400
150
350
mW
o
C
C
o
* Measure
θ
JC
on center of molding compound if IC has no tab.
** MIL-STD-202G 210F
Rev.H.05
5
嵌入式系统
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