AME AME8817AEDZ330 1.5a cmos ldo Datasheet

Analog Microelectronics, Inc.
INARY
PRELIM
AME8817
n General Description
1.5A CMOS LDO
n Features
The AME8817 family of positive, linear regulators feature low quiescent current (35µA typ.) with low dropout
voltage, making them ideal for battery applications.
Output voltages are set at the factory and trimmed to
1.5% accuracy.
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These rugged devices have both thermal shutdown, and
current fold-back to prevent device failure under the "worst"
of operating conditions.
In applications requiring a low noise, regulated supply,
place a 1000pF capacitor between Bypass and Ground.
An additional feature is a "Power Good" detector, which
pulls low when the output is out of regulation.
The AME8817 is stable with an output capacitance of
4.7µF or greater.
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l Low Temperature Coefficient
n Applications
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n Functional Block Diagram
IN
Very Low Dropout Voltage
Guaranteed 1.5A Output
Accurate to within 1.5%
35µA Quiescent Current Typically
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Noise Reduction Bypass Capacitor
Power Good Output
Power-Saving Shutdown Mode
Space-Saving DDPAK-7 Package
Instrumentation
Portable Electronics
Wireless Devices
PC Peripherals
Battery Powered Widgets
OUT
Overcurrent
Shutdown
n Typical Application
Thermal
Shutdown
R1
IN
OUT
IN
OUT
AME8817 P G
BYP (or ADJ)
BYP
AMP
PG
EN
1.24V
C1
5V
1 µF
C2
1nF
GND
EN
C3
4.7 µF
R2
GND
1
Analog Microelectronics, Inc.
INARY
PRELIM
AME8817
1.5A CMOS LDO
n Pin Configuration
DDPAK-7 (TO-263) Top View
AME8817AEDZXXX
1
2
3
4
5
6
7
AME8817BEDZXXX
1.
2.
3.
4.
EN
PG
VIN
GND
5. VOUT
6. VOUT
7. BYP
1
2
3
4
5
6
7
1.
2.
3.
4.
EN
PG
VIN
GND
5. VOUT
6. VOUT
7. ADJ
n Ordering Information
Output
Voltage
Package Type
1.50
AME8817AEDZ150
AME8817
AEDZ150
yyww
1.80
AME8817AEDZ180
AME8817
AEDZ180
yyww
2.50
AME8817AEDZ250
AME8817
AEDZ250
yyww
3.30
AME8817AEDZ330
AME8817
AEDZ330
yyww
4.75
AME8817AEDZ475
AME8817
AEDZ475
yyww
5.00
AME8817AEDZ500
AME8817
AEDZ500
yyww
ADJ
AME8817BEDZADJ
AME8817
BEDZADJ
yyww
MARKING
DDPAK-7
Please consult AME sales office or authorized Rep./Distributor for other output voltages, package types or pin configurations.
2
Analog Microelectronics, Inc.
INARY
PRELIM
AME8817
1.5A CMOS LDO
n Absolute Maximum Ratings:
Parameter
Maximum
Unit
8
V
Output Current
PD / (VIN - VO)
mA
Output Voltage
GND - 0.3 to VIN + 0.3
V
Input Voltage
ESD Classification
B
n Recommended operating Conditions:
Parameter
Rating
Ambient Temperature Range
Junction Temperature
Unit
-40 to +85
o
C
-40 to +125
o
C
n Thermal Information
Parameter
Thermal Resistance (θjc )
Internal Power Dissipation (PD )
Maximum
60
(∆ T = 100oC)
Unit
o
C/W
2.7
W
Maximum Junction Temperature
150
o
C
Maximum Lead Temperature ( 10 Sec)
300
o
C
Caution: Stress above the listed absolute rating may cause permanent damage to the device
3
Analog Microelectronics, Inc.
INARY
PRELIM
AME8817
1.5A CMOS LDO
n Electrical Specifications
TA = 25 o C unles s otherwis e noted
P a ra m e te r
V IN
O utput V oltage A c c urac y
VO
Dropout V oltage
Te st Condition
S ym bol
Input V oltage
V D R OPOU T
M in
Typ
Note 1
IO = 1m A to 1.5A
-1.5
1.5V < = V O N O M < = 2.0V
IO = 1500m A
V
1.5
%
S ee
c hart
2.8V < V O N O M < 3.8V
800
mV
600
IO
V O > 1.2V
1500
Current Lim it
ILIM
V O > 1.2V
1500
S hort Circ uit Current
ISC
V O < 0.4V
750
1500
mA
Quies c ent Current
IQ
IO = 0m A
35
50
µA
Ground P in Current
IG N D
IO = 1m A to 1.5A
Output Current
Line Regulation
Load Regulation
RE G LIN E
IO = 1m A
V IN = V O + 1 to V O + 2
2000
-0.15
mA
µA
0.15
%
4.0V > V O > = 2.0V
-0.1
0.02
0.1
%
V o > = 4.0V
-0.4
0.2
0.4
%
0.2
1
IO = 1m A to 1500m A
RE G LO AD
mA
35
V O < 2.0V
%
Over Tem erature S hutdown
OTS
150
o
Over Tem erature Hy s teris is
OTH
30
o
V O Tem perature Coeffic ient
TC
30
f= 1k Hz
P ower S upply Rejec tion
P ower S upply Rejec tion
P S RR
P S RR
IO = 100m A
IO = 100m A
C O = 4.7 µ F
C BY P = 0.01 µ F
eN
f= 10Hz to 100k Hz
IO = 10m A ,C BY P = 0 µ F
Output V oltage Nois e
eN
f= 10Hz to 100k Hz
IO = 10m A ,C BY P = 0.01 µ F
A DJ Input B ias Current
IAD J
A DJ Referenc e V oltage
V R EF
C
C
ppm / o C
50
f= 10k Hz
20
f= 100k Hz
15
f= 1k Hz
75
C O = 4.7 µ F
Output V oltage Nois e
E N Input Thres hold
f= 10k Hz
55
f= 100k Hz
30
Co= 4.7 µ F
30
Co= 100 µ F
20
Co= 4.7 µ F
30
Co= 100 µ F
20
dB
dB
m V rm s
m V rm s
1
1.223
1.242
mA
1.261
V
V EH
V I N = 2.7V to 7V
2.0
V in
V
V EL
V I N = 2.7V to 7V
0
0.4
V
IEH
V EN = V I N , V I N = 2.7V to 7V
0.1
µA
IEL
V EN = V O V , V I N = 2.7V to 7V
0.5
µA
S hutdown S upply Current
ISD
V I N = 5V , V O = 0V , V EN < V EL
Output Under V oltage
VUV
Note1
Output Over V oltage
V OV
Note1
E N Input B ias Current
0.5
1
µA
85
% V O (N O M)
115
% V O (N O M)
P G Leak age Current
ILC
V PG = 7V
1
mA
P G V oltage Rating
V PG
V O in regulation
7
V
P G V oltage Low
V OL
ISI N K = 500 µ A
0.4
V
Note1:V I N (m in) = V O U T+ V D R O P O U T
4
Units
7
1000
2.0V < V O N O M < = 2.8V
V O = V O N O M -2.0%
Max
Analog Microelectronics, Inc.
AME8817
INARY
PRELIM
1.5A CMOS LDO
n Detailed Description
The AME8817 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error amplifier,
over-current protection, and thermal shutdown.
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 2.2A. During thermal shutdown, the output voltage remains low. Normal operation
is restored when the junction temperature drops below
110oC.
The AME8817 behaves like a current source when the
load reaches 2.2A. However, if the load impedance
drops below 0.3 ohms, the current drops back to 600mA
to prevent excessive power dissipation. Normal operation is restored when the load resistance exceeds
0.75 ohms.
n External Capacitors
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
When 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 AME8817 includes the Power Good feature. Normally, the PG pin is "Floating", however, when the output is not within ±15% 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.
The AME8817 is stable with an output capacitor to ground
of 4.7µF 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.
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.
A third capacitor can be connected between the BYPASS pin and GND. This capacitor can be a low cost
Polyester Film variety between the value of 0.001 ~
0.01µF. A larger capacitor improves the AC ripple rejection, but also makes the output come up slowly. This
"Soft" turn-on is desirable in some applications to limit
turn-on surges.
5
Analog Microelectronics, Inc.
INARY
PRELIM
AME8817
1.5A CMOS LDO
Dropout Voltage vs. I LOAD
1.2
I L O A D =1.5A
1.5
1
0.8
Dropout Voltage (V)
Dropout Voltage (V)
Dropout Voltage vs. V OUT
1
1.8
0.8
2.0
0.6
2.1
0.4
2.8
3.3
0.2
0.6
I L O A D =1.0A
0.4
I L O A D =0.5A
0.2
0
0
0
0.3
0.6
0.9
1.2
1.5
0
1.8
2
4
I LOAD (A)
Ground Current vs. Temperature
50
I O U T = 1.8mA
V O U T = 1.8V
V I N = 5V
37
45
µA)
Ground Current (µ
µA)
Ground Current (µ
38
36
35
34
33
32
31
40
35
I O U T = 140mA
V O U T = 1.5V
30
25
20
15
30
10
0
50
100
150
Temperature ( O C)
Ground Current vs. Load Current
38
37.5
V I N = 2.5V
V O U T = 1.5V
37
36.5
36
35.5
35
34.5
0
0.25
0.5
0.75
2
3
4
5
V IN (V)
38.5
µA)
Ground Current (µ
8
Ground Current vs. V IN
39
1
Load Current (mA)
6
6
V O U T (V)
1.25
1.5
6
7
8
Analog Microelectronics, Inc.
INARY
PRELIM
AME8817
1.5A CMOS LDO
Load Step 40mA to 1.5A
ILOAD 1A/DIV
VOUT (50mV/DIV)
Transient Line Response
0A
C IN = 4.7µF
C O U T = 4.7µF
V IN = 4.0V
V O U T = 1.8V
VOUT 10mV/DIV
VIN (2V/DIV)
C IN = 4.7µF
C O U T = 4.7µF
T R = T F = 1µS
VOUT = 1.5V
0V
Time (20 µS/DIV)
Time 500 µS/DIV
Current Limit Vs. V IN
Current Limit Response
3
2.8
0V
ILOAD 1A/DIV
C I N = 4.7µF
C O U T = 4.7µF
V O U T = 1.8V
2.6
IL I M
IS C
Current Limit (A)
VOUT 1V/DIV
V I N = 5V
C I N = 4.7µF
C O U T = 4.7µF
2.4
2.2
2
1.8
1.6
1.4
0A
1.2
1
Time 1mS/DIV
2
3
4
5
6
7
8
V IN (V)
Short Circuit Current VS. V IN
Overtemperature Shutdown
IOUT 1A/DIV
1.4
C I N = 4.7µF
C O U T = 4.7µF
1.2
1
0.8
VOUT 1V/DIV
Short Circuit Current (A)
1.6
0.6
0.4
0.2
0A
V I N = 4V
C I N = 4.7µF
C O U T = 4.7µF
0V
0
2
3
4
5
V IN (V)
6
7
8
Time 100mS/DIV
7
Analog Microelectronics, Inc.
INARY
PRELIM
AME8817
1.5A CMOS LDO
Stability vs. ESR vs I LOAD
10000
Stability vs. ESR vs I LOAD
10000
Unstable Region
Unstable Region
1000
1000
C L =5 µF
10
1
Stable Region
0.1
0
250
Untested Region
500
750
1000 1250
1
Stable Region
1500
Stability vs. ESR vs I LOAD
Unstable Region
100
C L =10µF
10
1
Stable Region
0.1
0.01
Untested Region
0.001
0
250
500
750
1000
ILOAD (mA)
0
250
500
750
1000
ILOAD (mA)
10000
1000
Untested Region
0.01
ILOAD (mA)
ESR (Ω
Ω)
10
0.1
0.01
8
C L =2 µF
100
Ω)
ESR (Ω
ESR (Ω
Ω)
100
1250
1500
1250
1500
Analog Microelectronics, Inc.
AME8817
INARY
PRELIM
1.5A CMOS LDO
n Package Dimension
TO-263 (DDPAK-7)
SYMBOLS
A
B
C
D
E
G
H
K
L
M
N
P
R
S
W
MILLIMETERS
MIN
MAX
10.05
10.31
8.28
8.53
4.31
4.57
0.66
0.91
1.14
1.40
1.27 ref
14.73
15.75
1.40
1.68
0.00
0.25
2.49
2.74
0.43
0.58
2.29
2.79
o
8?
0
2.41
2.67
0.25
INCHES
MIN
MAX
0.396
0.406
0.326
0.336
0.170
0.180
0.026
0.036
0.045
0.055
0.050 ref
0.580
0.620
0.000
0.066
0.055
0.010
0.000
0.108
0.098
0.023
0.017
0.110
o
0
8?
0.095
0.105
0.01
9
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E-Mail: [email protected]
Life Support Policy:
These products of Analog Microelectronics, Inc. are not authorized for use as critical components in lifesupport devices or systems, without the express written approval of the president
of Analog Microelectronics, Inc.
Analog Microelectronics, 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.
 Analog Microelectronics, Inc. , August 2001
Document: 2013-doc-006-0806
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