AME AME8831

AME
AME8831
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
n General Description
n Applications
l Instrumentation
The AME8831 family of positive, linear regulators feature 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.
l Portable Electronics
l Wireless Devices
l Cordless Phones
l PC Peripherals
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.
l Battery Powered Widgets
l Electronic Scales
n Function Block Diagram
VOUT
VIN
* ENB or EN
10 k
The AME8831 also features a logic-enabled sleep mode
to shutdown the regulator, reducing quiescent current to
1µA typical at TA= 25oC.
Current Limit
/ Thermal
Protection
AMP
R1
V ref
GND
The AME8831 is stable with an output capacitance of
4.7µF or larger.
R2
SR
* AME8831A: ENB, AME8831B: EN
n Features
n Typical Application
l Guaranteed 150mA Output
l Dropout Voltage Typically 150 mV at 150 mA
VIN
l 17µA Quiescent Current
l Over-Temperature Shutdown
IN
SR
AME8831A
1µF
ENB
l Over-Current Limitation
GND
OUT
0.01µF
+
l Noise Reduction Bypass Capacitor
4.7µF
l Power-Saving Shutdown Mode
l Space-Saving SOT-25 Package
l Factory Pre-set Output Voltages
l Enable pin option
VIN
l ENB active low enable
l EN active high enable
l All AME's Lead Free Products Meet RoHS
Standards
Rev.H.05
1µF
IN
SR
AME8831B
EN
GND
OUT
0.01µF
+
4.7µF
1
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Pin Configuration
SOT-25
Top View
5
SOT-25
Top View
4
AME8831
AME8831A
5
4
1. IN
1. IN
2. GND
2. GND
AME8831
3. ENB
4. SR
2
3
3. EN
4. SR
5. OUT
1
AME8831B
5. OUT
* Die Attach:
Conductive Epoxy
1
2
3
* Die Attach:
Conductive Epoxy
n Pin Description
Pin Number
Pin Name
1
IN
2
GND
Input voltage pin.
It should be decoupled with 1µF or greater capacitor.
Ground connection pin.
EN
Enable pin.
When pulled low, the PMOS pass transistor turns off, current
consuming less than 1µA.
ENB
Enable bar pin.
When pulled high, the PMOS pass transistor turns off, current
consuming less than 1µA.
4
SR
The SR(Slew Rate) terminal is used to control the VOUT in-rush
current.
5
OUT
3
2
Pin Description
LDO voltage regulator output pin.
It should be decoupled with a 1µF or greater value low ESR
ceramic capacitor.
Rev.H.05
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Ordering Information
AME8831 x x x x xxx x
Special Feature
Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Pin
Configuration
A: 1. IN
2. GND
3. ENB
4. SR
5. OUT
(SOT-25)
Operating Ambient
Temperature
Range
E: -40OC to +85OC
Package Type
Number
of
Pins
E: SOT-2X
V: 5
Output
Voltage
180:
250:
285:
300:
330:
V=1.8V
V=2.5V
V=2.85V
V=3.0V
V=3.3V
Special Feature
Y: Lead free & Low profile
Z: Lead free
B: 1. IN
2. GND
3. EN
4. SR
5. OUT
(SOT-25)
Rev.H.05
3
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Ordering Information
Part Number
Marking*
Output Voltage
Package
Operating Ambient
Temperature Range
AME8831AEEV180Z
BIKww
1.8V
SOT-25
- 40oC to +85oC
AME8831AEEV180Y
BIKww
1.8V
TSOT-25
- 40oC to +85oC
AME8831AEEV250Z
BILww
2.5V
SOT-25
- 40oC to +85oC
AME8831AEEV250Y
BILww
2.5V
TSOT-25
- 40oC to +85oC
AME8831AEEV285Z
BIHww
2.85V
SOT-25
- 40oC to +85oC
AME8831AEEV285Y
BIHww
2.85V
TSOT-25
- 40oC to +85oC
AME8831AEEV300Z
BIMww
3.0V
SOT-25
- 40oC to +85oC
AME8831AEEV300Y
BIMww
3.0V
TSOT-25
- 40oC to +85oC
AME8831AEEV330Z
BDVww
3.3V
SOT-25
- 40oC to +85oC
AME8831AEEV330Y
BDVww
3.3V
TSOT-25
- 40oC to +85oC
AME8831BEEV180Z
BEYww
1.8V
SOT-25
- 40oC to +85oC
AME8831BEEV180Y
BEYww
1.8V
TSOT-25
- 40oC to +85oC
AME8831BEEV250Z
BFJww
2.5V
SOT-25
- 40oC to +85oC
AME8831BEEV250Y
BFJww
2.5V
TSOT-25
- 40oC to +85oC
AME8831BEEV285Z
BEZww
2.85V
SOT-25
- 40oC to +85oC
AME8831BEEV285Y
BEZww
2.85V
TSOT-25
- 40oC to +85oC
AME8831BEEV300Z
BFAww
3.0V
SOT-25
- 40oC to +85oC
AME8831BEEV300Y
BFAww
3.0V
TSOT-25
- 40oC to +85oC
AME8831BEEV330Z
BFBww
3.3V
SOT-25
- 40oC to +85oC
AME8831BEEV330Y
BFBww
3.3V
TSOT-25
- 40oC to +85oC
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
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Absolute Maximum Ratings
Parameter
Maximum
Unit
6
V
Output Current
PD / (V IN - VOUT)
mA
Output Voltage
GND-0.3 to VIN +0.3
V
Input Voltage
C*
ESD Classification
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
*HBM C: 4000V+
n Recommended Operating Conditions
Parameter
Symbol
Rating
Ambient Temperature Range
TA
- 40 to +85
Junction Temperature Range
TJ
- 40 to +125
Storage Temperature Range
TSTG
-65 to +150
Unit
o
C
n Thermal Information
Parameter
Package
Die Attach
Thermal Resistance*
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Symbol
Maximum
θJC
81
Unit
o
SOT-25
Conductive Epoxy
Internal Power Dissipation
θJA
260
PD
400
C/W
mW
Maximum Junction Temperature
150
o
C
Solder Iron (10 Sec)**
350
o
C
* Measure θJC on center of molding compound if IC has no tab.
** MIL-STD-202G 210F
Rev.H.05
5
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Electrical Specifications
Over operating temperature range(TJ=-40oC to +125oC), VIN=VOUT(nom) + 1V, or VIN=VIN(Min) whichever is greater,
IOUT=1mA, VEN =VIN(V ENB=0), and COUT=4.7uF, CIN=1uF unless otherwise noted. Typical values are at TA=25oC.
Parameter
Input Voltage
Symbol
Test Condition
Min
Max
Units
Note1
5.5
V
TA=25 C
-1.5
1.5
TJ = -40oC to +125 oC
-3
3
VIN
o
Output Voltage Accuracy
VOUT(nom)
Line Regulation
∆V OUT
*%
V OUT
∆V IN
REGLINE
VOUT=1.8,
TA=25oC
2.5V<V IN <5.5V
TJ= -40 C to +125 C
o
VOUT=2.5,
TA=25 C
3V<VIN <5.5V
TJ= -40 C to +125 C
o
o
TA=25 C
-0.25
3.3V<V IN <5.5V
TJ= -40 C to +125 C
-0.35
VOUT=3.0,
TA=25oC
-0.25
3.5V<V IN <5.5V
TJ= -40 C to +125 C
o
o
o
o
VOUT=3.3,
TA=25 C
3.8V<V IN <5.5V
TJ= -40 C to +125 C
o
(See Note2)
Output Current Limit
ILIM
VOUT=0V
o
0.15
0.3
0.25
0.35
0.15
0.25
0.35
0.15
-0.35
-0.2
0.35
0.1
-0.3
200
10µA<IOUT<150mA
TA=25 C
10µA<IOUT<150mA
TJ = -40 C to +125 C
o
%/V
0.25
0.2
0.3
150
o
%
0.4
-0.35
VOUT=2.85,
o
0.2
-0.40
-0.25
o
IOUT
IQ
o
o
Output Current
Quiescent Current
-0.30
Typ
mA
350
750
17
25
o
30
mA
µA
Load Regulation =
∆V OUT
*%
V OUT
∆I ( mA)
REGLOAD 10µA<=IOUT<=150mA
TA=25oC
-0.1 0.0025
0.1
%/mA
Note1 : VIN(min) = VOUT + V DROPOUT(max)
Note2 : Continuous output current and operating junction temperature are limited by internal protection circuitry,
but it is not recommended that the device operate under conditions beyond those specified in this table for
extended periods of time.
6
Rev.H.05
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Electrical Specifications (contd.)
Parameter
Test Condition
Symbol
TA=25 C
VOUT(nom)=1.8V
IOUT=150mA
o
Dropout Voltage @ VOUT=
VOUT(nom)-2%VOUT(nom)
VDO
800
850
o
450
o
o
TA=25 C
350
o
TJ=-40 C to +125 C
VOUT(nom)=3V
TA=25oC
o
250
o
mV
350
400
o
TA=25 C
o
400
450
TJ=-40 C to +125 C
VOUT(nom)=3.3V
500
550
TJ=-40 C to +125 C
o
Units
900
TA=25 C
IOUT=150mA
IOUT=150mA
Max
o
o
VOUT(nom)=2.85V
IOUT=150mA
Typ
TJ=-40 C to +125 C
VOUT(nom)=2.5V
IOUT=150mA
Min
o
150
o
250
300
TJ=-40 C to +125 C
Over Temerature Shutdown
OTS
Over Temerature Hysterisis
OTH
20
TC
30
ppm
TA=25oC
65
dΒ
TA=25oC
100
µVRMS
VOUT Temperature Coefficient
Thermal shutdown increasing
150
o
C
VOUT=3.3V, f=1 kHz,
Power Supply Ripple
Rejection
PSRR
IOUT = 100mA
COUT=10µF
C(SR)=0.01µF
BW=200Hz to 100kHz
Output Voltage Noise
eN
IOUT=150mA
COUT=10µF,
C(SR)=0.47µF
VENBH
ENB and EN Input Threshold
1.4
VENH
VENBL
VIN
VIN=2.5V to 5.5V
V
0
VENL
0.3
EN or ENB Input Bias Current
IEN
ENB=0, EN=VIN VIN =2.5V to 5.5V
0.1
1
µA
Shutdown Current
ISD
ENB=VIN , EN=0 VIN =2.5V to 5.5V
1
2
µA
VOUT=3.3V
Start up Time
Rev.H.05
TSTR
CSR =0.01µF
RLOAD =22Ω
CSR =0.1µF
COUT=10µF
CSR =0.22µF
20
o
TA=25 C
200
ms
450
7
AME
AME8831
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
n Detail Description
The AME8831 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown function.
The P-channel pass transistor receives data from
the error amplifier, over-current limit, 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 about 350mA. During
thermal shutdown, the output voltage remains low.
Normal operation is restored when the junction temperature drops below 120oC.
The AME8831 switches from voltage mode to current mode when the load exceeds the rated output
current. This prevents over-stress.
n External Capacitors
The AME8831 is stable with an output capacitor to
ground of 4.7µF or greater. Ceramic capacitors have
the lower ESR, and will offer the best AC performance.
Conversely, Aluminum Electrolytic capacitors exhibit
the higher ESR, resulting in the poor 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
n Enable
The Enable pin is optional. EN for active high enable, ENB for active low enable. When disable the
Enable Pin EN=0, ENB=VIN, the PMOS pass transistor shuts off, and all internal circuits are powered down.
In this state, the standby current is less than 1µA.
8
Rev.H.05
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
Output Noise Spectral Density
Output Voltage vs Load Current
10
3.26
Noise (µV/ √ Hz)
Output Voltage (V)
VIN=4.3V
COUT=4.7µF
C(SR)=0.47µF
V IN=4.3V
T J=25℃
3.25
3.24
3.23
3.22
3.21
IO =150mA
1
IO=1mA
3.2
3.19
0
15
30
45
60
75
90
105
120
135
0.1
100
150
1000
10000
Output Impedance vs Frequency
Quiescent Current vs Temperature
2.0
30
VIN =4.3V
C O=4.7 µF
1.6
Output Impedance
Quiescent Current (uA)
1.8
25
IO=1mA
20
IO=150mA
15
10
1.4
1.2
1.0
IO =50mA
0.8
0.6
0.4
5
0.2
0
-40
-20
-5
25
55
85
0
100
125
IO=150mA
1000
10000
Dropout Voltage vs. Temperature
Ripple Rejection vs Frequency
V IN =4.3V
V OUT=3.3V
COUT =10µF
C(SR)=0.47µF
VIN=4.3V
100
Ripple Rejection (dB)
250
Dropout Voltage (mV)
1000000
120
300
200
IO=150mA
150
100
IO=1mA
80
60
I O=150mA
40
20
50
-20
25
Temperature (o C)
Rev.H.05
100000
Frequency (Hz)
Temperature (o C)
0
-40
100000
Frequency (Hz)
Load Current (mA)
85
125
0
100
1000
10000
100000
1000000
Frequency (Hz)
9
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
VOUT vs Temperature
Line Transient Response
3.28
Input Voltage
(V)
IOUT=1mA
3.26
5.3
Output Voltage
(mV)
VOUT (V)
4.3
3.24
IOUT=150mA
3.22
3.20
VIN=4.3V
3.18
-40
125
Enable Voltage
(V)
(Start-Up)
3
2
V IN =4.3V
V OUT=3.3V
IO=150mA
C (SR)=0.22µF
CO =10µF
TJ =25oC
5
0
C (SR) =0.01µF
3
C (SR)=0.1 µF
V IN =4.3V
V OUT=3.3V
IO =150mA
C O=10µF
TJ =25 oC
2
1
0
Time (10mS/Div)
Stability vs ESR vs ILOAD
Load Transient Response
100
200
100
0
Unstable Region
VIN=4.3V
VOUT =3.3V
CL =1µF
10
ESR (Ω)
Output Current
(mA)
85
(Start-Up)
Time (10mS/Div)
0
Output Voltage
(mV)
55
Output Voltage, Enable Voltage vs Time
0
0
25
Output Voltage, Enable Voltage vs Time
5
1
-20
Temperature (oC)
Output Voltage
(V)
Output Voltage
(V)
Enable Voltage
(V)
Time (20µS/Div)
-50
VIN =4.3V
VOUT =3.3V
C O=10 µF
TJ=25oC
Stable Region
1
Untested Region
Time (20µS/Div)
0.1
0
60
90
120
150
ILOAD (mA)
10
Rev.H.05
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
Stability vs ESR vs ILOAD
100
Unstable Region
V IN =4.3V
V OUT=3.3V
CL =10µF
ESR (Ω)
10
Stable Region
1
Untested Region
0.1
0
60
90
120
150
ILOAD (mA)
Rev.H.05
11
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
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-25
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
12
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT-25
8.0±0.1 mm
4.0±0.1 mm
3000pcs
180±1 mm
Rev.H.05
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Tape and Reel Dimension
TSOT-25
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
Rev.H.05
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
TSOT-25
8.0±0.1 mm
4.0±0.1 mm
3000pcs
180±1 mm
13
AME
150mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8831
n Package Dimension
SOT-25
Top View
Side View
SYMBOLS
D
L
MIN
E
H
MILLIMETERS
θ1
S1
1.20REF
A
0.0472REF
0.15
0.0000
0.0059
b
0.30
0.55
0.0118
0.0217
D
2.70
3.10
0.1063
0.1220
E
1.40
1.80
0.0551
0.0709
1.90 BSC
e
θ1
2.60
0.07480 BSC
3.00
0.37BSC
0
o
0.10236 0.11811
0.0146BSC
10
o
0
o
10
0.95BSC
0.0374BSC
MILLIMETERS
INCHES
S1
o
A1
A
MAX
0.00
L
Front View
MIN
A1
H
e
MAX
INCHES
b
TSOT-25
Top View
Side View
SYMBOLS
MIN
MAX
MIN
MAX
A+A1
0.90
1.25
0.0354
0.0492
b
0.30
0.50
0.0118
0.0197
c
0.09
0.25
0.0035
0.0098
D
2.70
3.10
0.1063
0.1220
E
1.40
1.80
0.0551
0.0709
E
H
L
D
θ1
S1
e
1.90 BSC
e
H
2.40
b
14
S1
0
o
10
0.95BSC
0.09449 0.11811
0.0138BSC
o
0o
10o
0.0374BSC
A1
A
θ1
3.00
0.35BSC
L
Front View
0.07480 BSC
Rev.H.05
www.ame.com.tw
E-Mail: sales@ame.com.tw
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 2008
Document: 1009-DS8831-H.05
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District
Taipei 114, Taiwan.
Tel: 886 2 2627-8687
Fax: 886 2 2659-2989