AME AME8821_08

AME
AME8821
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
n General Description
n Applications
The AME8821 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/TSOT-25 packages are attractive
for “Pocket” and “Hand Held”applications.
l Instrumentation
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” operating conditions. In application requires a
low noise regulated supply. The AME8821 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
n Function Block Diagram
VOUT
VIN
* ENB or EN
10KΩ
The AME8821 also features a logic-enabled sleep mode
to shutdown the regulator, reducing quiescent current to
1µA typical at T A= 25oC.
The AME8821 is stable with an output capacitance of
4.7µF or larger.
Current Limit
/ Thermal
Protection
AMP
R1
Vref
GND
R2
SR
* AME8821A: ENB, AME8821B: EN
n Features
n Typical Application
l Guaranteed 250mA Output
l 17µA Quiescent Current
VIN
l Over-Temperature Shutdown
l Over-Current Limitation
SR
IN
AME8821A
1µF
ENB
GND
OUT
l Noise Reduction SR Capacitor
0.01µF
+
4.7µF
l Power-Saving Shutdown Mode
l Space-Saving SOT-25/TSOT-25 Packages
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
VIN
1µF
IN
SR
AME8821B
EN
GND
OUT
0.01µF
+
4.7µF
Rev.A.04
1
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
n Pin Configuration
SOT-25/TSOT-25
Top View
SOT-25/TSOT-25
Top View
5
4
AME8821
AME8821AEEV
5
4
1. IN
1. IN
2. GND
2. GND
AME8821
3. ENB
4. SR
2
3
3. EN
4. SR
5. OUT
1
AME8821BEEV
5. OUT
* Die Attach:
Conductive Epoxy
1
2
3
* Die Attach:
Conductive Epoxy
n Pin Description
Pin Number
Pin Name
1
IN
2
GND
5
2
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.
SR
The SR(Slew Rate) terminal is used to control the VOUT in-rush
current.
3
4
Pin Description
OUT
LDO voltage regulator output pin.
It should be decoupled with a 4.7µF or greater value low ESR
ceramic capacitor.
Rev.A.04
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
n Ordering Information
AME8821 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. IN
2. GND
(TSOT-25) 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
(TSOT-25) 3. EN
4. SR
5. OUT
(SOT-25)
Rev.A.04
3
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
n Ordering Information
Part Number
Marking*
Output Voltage
Package
Operating Ambient
Temperature Range
AME8821AEEV180Z
BHXww
1.8V
SOT-25
- 40oC to +85oC
AME8821AEEV180Y
BHXww
1.8V
TSOT-25
- 40oC to +85oC
AME8821AEEV250Z
BHYww
2.5V
SOT-25
- 40oC to +85oC
AME8821AEEV250Y
BHYww
2.5V
TSOT-25
- 40oC to +85oC
AME8821AEEV285Z
BHZww
2.85V
SOT-25
- 40oC to +85oC
AME8821AEEV285Y
BHZww
2.85V
TSOT-25
- 40oC to +85oC
AME8821AEEV300Z
BIAww
3.0V
SOT-25
- 40oC to +85oC
AME8821AEEV300Y
BIAww
3.0V
TSOT-25
- 40oC to +85oC
AME8821AEEV330Z
BIBww
3.3V
SOT-25
- 40oC to +85oC
AME8821AEEV330Y
BIBww
3.3V
TSOT-25
- 40oC to +85oC
AME8821BEEV180Z
BICww
1.8V
SOT-25
- 40oC to +85oC
AME8821BEEV180Y
BICww
1.8V
TSOT-25
- 40oC to +85oC
AME8821BEEV250Z
BIDww
2.5V
SOT-25
- 40oC to +85oC
AME8821BEEV250Y
BIDww
2.5V
TSOT-25
- 40oC to +85oC
AME8821BEEV285Z
BIEww
2.85V
SOT-25
- 40oC to +85oC
AME8821BEEV285Y
BIEww
2.85V
TSOT-25
- 40oC to +85oC
AME8821BEEV300Z
BIFww
3.0V
SOT-25
- 40oC to +85oC
AME8821BEEV300Y
BIFww
3.0V
TSOT-25
- 40oC to +85oC
AME8821BEEV330Z
BIGww
3.3V
SOT-25
- 40oC to +85oC
AME8821BEEV330Y
BIGww
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 BHXww.
Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability.
4
Rev.A.04
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
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)
Symbol
Maximum
θJC
81
Unit
o
C/W
Thermal Resistance
(Junction to Ambient)
SOT-25
TSOT-25
Conductive Epoxy
Internal Power Dissipation
Solder Iron (10 Sec)**
θJA
260
PD
400
350
mW
o
C
* Measure θJC on center of molding compound if IC has no tab.
** MIL-STD-202G 210F
Rev.A.04
5
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
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(VENB = 0), and COUT = 4.7µF, CIN = 1µF unless otherwise noted. Typical values are at T A = 25oC.
Parameter
Symbol
Test Condition
Input Voltage
Output Voltage Accuracy
VOUT(nom)
VOUT
REGLINE
x 100%
Output Current Limit
Quiescent Current
IOUT
ILIM
IQ
V
5.5
1.5
TJ = -40oC to +125oC
-3
3
VOUT = 2.85V,
3.3V < VIN < 5.5V
VOUT = 3.3V,
3.8V < VIN < 5.5V
Output Current
Units
-1.5
VOUT = 3.0V,
3.5V < VIN < 5.5V
∆ VIN
Max
Note1
VOUT = 2.5V,
3V < VIN < 5.5V
Output Voltage Line
Regulation
Typ
TA = 25oC
VOUT = 1.8V,
2.5V < VIN < 5.5V
∆VOUT
Min
VIN
TA = 25oC
o
-0.30
o
TJ = -40 C to +125 C
o
o
o
TJ = -40 C to +125 C
o
o
TJ = -40 C to +125 C
-0.35
TA = 25oC
-0.25
o
o
TJ = -40 C to +125 C
o
o
o
TJ = -40 C to +125 C
(See Note2)
VOUT = 0V, TA = 25 C
10µA < IOUT < 250mA
0.25
0.35
0.15
0.25
0.15
0.25
0.35
0.1
-0.3
300
o
TA = 25 C
o
%/V
0.35
0.2
0.3
250
o
10µA < IOUT < 250mA
0.15
-0.35
-0.2
TA = 25 C
0.3
0.4
-0.35
-0.25
TA = 25 C
o
-0.40
-0.25
TA = 25 C
0.2
%
mA
350
750
17
25
o
30
TJ = -40 C to +125 C
mA
µA
Output Voltage Load
Regulation
∆VOUT
VOUT
x 100%
REGLOAD 1mA <= IOUT <= 250mA
o
TA = 25 C
-0.1
0.0025
0.1
%/mA
∆ IOUT
Note1 : VIN = VOUT + VDROP
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.A.04
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
n Electrical Specifications (contd.)
Parameter
Test Condition
Symbol
VOUT(nom) = 1.8V
IOUT = 250mA
VOUT(nom) = 2.5V
IOUT = 250mA
Dropout Voltage @ VOUT =
VOUT(nom) - 2%VOUT(nom)
VDROP
VOUT(nom) = 2.85V
IOUT = 250mA
VOUT(nom) = 3V
IOUT = 250mA
VOUT(nom) = 3.3V
IOUT = 250mA
Thermal Shutdown Temerature TSHDN
Temerature Hysterisis
Output Voltage Temperature
Coefficient
Power Supply Ripple
Rejection
Output Voltage Noise
Min
o
TA = 25 C
Typ
Max
1000
1100
TJ = -40oC to +125oC
1200
o
500
TA = 25 C
o
o
TA = 25oC
400
o
o
400
TA = 25 C
o
mV
550
600
TJ = -40 C to +125 C
TA = 25oC
o
550
600
TJ = -40 C to +125 C
o
600
650
TJ = -40 C to +125 C
o
Units
400
o
550
600
TJ = -40 C to +125 C
Thermal shutdown increasing
150
o
C
THYS
20
TC
30
ppm
65
dB
100
µVRMS
PSRR
eN
Enable Bar High (Shutdown)
VENB(HI)
Enable High (Enabled)
VEN(HI)
VOUT = 3.3V, f = 1KHz,
IOUT = 100mA
COUT = 4.7µF
C(SR) = 0.01µF
BW = 200Hz to 100KHz
IOUT = 250mA
COUT = 4.7µF,
C(SR) = 0.47µF
TA = 25oC
o
TA = 25 C
VIN
1.4
VIN = 2.5V to 5.5V
V
Enable Bar Low (Enabled)
VENB(LO)
Enable Low (Shutdown)
VEN(LO)
Enable / Enable Bar Pin
Current (Enabled)
IEN / IENB
ENB = 0, EN = VIN, VIN = 2.5V to 5.5V
0.1
1
µA
ISHDN
ENB = VIN, EN = 0, VIN = 2.5V to 5.5V
1
2
µA
Shutdown Current
Start up Time
Rev.A.04
TSTR
0
VOUT = 3.3V
RLOAD = 22Ω
COUT = 10µF
C(SR) = 0.01µF
C(SR) = 0.1µF
C(SR) = 0.22µF
0.3
20
o
TA = 25 C
200
mS
450
7
AME
AME8821
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
n Detail Description
The AME8821 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 130oC.
The AME8821 switches from voltage mode to current mode when the load exceeds the rated output
current. This prevents over-stress.
n External Capacitors
The AME8821 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 V IN. The input capacitor
should be at least 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.A.04
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
Output Voltage vs Load Current
Quiescent Current vs Temperature
3.310
30
IOUT = 250mA
VIN = 4.3V
TA = 25oC
3.300
Quiescent Current (µA)
Output Voltage (V)
3.305
3.295
3.290
3.285
3.280
3.275
3.270
25
IOUT = 1mA
20
15
10
5
VIN = 4.3V
3.265
3.260
0
-40
0 15 30 45 60 75 90 105 120135150165 180195 210225 240
Load Current (mA)
-10
5
20
35
50
65
80
95
110
125
Temperature (oC)
Output Spectral Noise Density vs. Frequency
Dropout Voltage vs. Temperature
400
400
VIN=4.3V
COUT=4.7µF
C(SR)=0.47µF
VIN = 4.3V
IOUT = 250mA
350
300
Noise (µV/√Hz)
Dropout Voltage (V)
-25
250
200
150
100
300
200
IOUT = 250mA
100
50
IOUT =1mA
0
-40
-25
-10
5
20
35
50
65
o
80
95
Power Supply Ripple Rejection Ratio
100
VIN = 4.3V
COUT = 4.7µF
VIN = 4.3V
VOUT = 3.3V
COUT = 4.7µF
C(SR) = 0.47µF
90
Ripple Rejection (dB)
Output Impedance (Ω)
100000
Output Impedance vs. Frequency
1.6
1.4
1.2
1.0
0.8
IOUT = 250mA
0.4
80
70
IOUT = 250mA
60
50
IOUT = 1mA
40
30
20
IOUT = 50mA
0.2
10
100
1000
10000
Frequency (Hz)
Rev.A.04
10000
Frequency (Hz)
2.0
0
10
1000
Temperature ( C)
1.8
0.6
0
100
110 125
100000
1000000
0
10
100
1000
10000
100000
1000000
Frequency (Hz)
9
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
Load Transient Response
5.3
Output Voltage
(mV)
4.3
20
0
-20
300
Output Voltage Output Current
(mV)
(mA)
Input Voltage
(V)
Line Transient Response
VIN = 4.3V
VOUT = 3.3V
COUT = 4.7µF
100
0
-100
Time (20µS/Div)
Output Voltage, Enable Voltage vs Time
(Start-Up)
3
2
1
0
VIN = 4.3V
VOUT = 3.3V
IOUT = 250mA
C(SR) = 0.22µF
COUT = 4.7µF
TA = 25℃
Output Voltage Enable Voltage
(V)
(V)
Output Voltage Enable Voltage
(V)
(V)
Output Voltage, Enable Voltage vs Time
(Start-Up)
0
5
0
3
VIN = 4.3V
VOUT = 3.3V
IOUT = 250mA
C(SR) = 0.01µF
COUT = 4.7µF
TA = 25℃
2
1
0
Time (10mS/Div)
Time (100mS/Div)
Output Voltage, Enable Voltage vs Time
(Start-Up)
Output Voltage vs. Temperature
3.290
IOUT = 1mA
3.285
5
3.280
0
3
2
1
0
VIN = 4.3V
VOUT = 3.3V
IOUT = 250mA
C(SR) = 0.1µF
COUT = 4.7µF
TA = 25℃
Time (100mS/Div)
Output Voltage (V)
Output Voltage Enable Voltage
(V)
(V)
100
0
Time (20µS/Div)
5
200
3.275
3.270
3.265
3.260
3.255
3.250
3.245
IOUT = 250mA
VIN = 4.3V
3.240
3.235
-40
-25
-10
5
20
35
50
65
80
95
110
125
Temperature (oC)
10
Rev.A.04
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
Stability vs ESR vs I LOAD
100
Unstable Region
VIN = 4.3V
VOUT = 3.3V
COUT= 4.7µF
ESR (Ω)
10
Stable Region
1
Untested Region
0.1
0
60
90
120
150
ILOAD (mA)
Rev.A.04
11
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
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.A.04
AME
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
n Tape and Reel Dimension
TSOT-25
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
Rev.A.04
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
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
AME8821
n Package Dimension
SOT-25
Top View
Side View
D
θ1
SYMBOLS
MILLIMETERS
MIN
E
H
A
PIN 1
L
S1
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
2.60
θ1
0.07480 BSC
3.00
0.37BSC
L
A
MAX
0.0472REF
0.00
H
Front View
MIN
A1
e
e
MAX
1.20REF
INCHES
0o
0.10236 0.11811
0.0146BSC
10 o
0o
10 o
0.95BSC
0.0374BSC
MILLIMETERS
INCHES
A1
S1
b
TSOT-25
Top View
Side View
D
E
H
θ1
PIN 1
L
S1
SYMBOLS
MIN
MAX
MIN
MAX
A+A1
0.90
1.25
0.0354
0.0492
b
0.30
0.50
0.0118
0.0197
D
2.70
3.10
0.1063
0.1220
E
1.40
1.80
0.0551
0.0709
H
e
1.90 BSC
e
2.40
b
14
S1
0
o
10
0.95BSC
0.09449 0.11811
0.0138BSC
o
0o
10 o
0.0374BSC
A1
A
θ1
3.00
0.35BSC
L
Front View
0.07480 BSC
Rev.A.04
www.ame.com.tw
E-Mail: sa[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. , November 2008
Document: 1009-DS8821-A.04
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