Analog Microelectronics AME8817AEDZADJ, AME8817AEDZ500, AME8817AEDZ475, AME8817AEDZ330, AME8817AEDZ250 Datasheet

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Analog Microelectronics, Inc.
1
AME8817
1.5A CMOS LDO
PRELIMINARY
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n T ypical Application
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n Functional Block Diagram
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l Very Low Dropout V oltage l Guaranteed 1.5A Output l Accurate to within 1.5% l 35µA Quiescent Current Typically l Over-Temperature Shutdown l Current Limiting l Short Circuit Current Fold-back l Noise Reduction Bypass Capacitor l Power Good Output l Power-Saving Shutdown Mode l Space-Saving DDPAK-7 Package
l Low T emperature Coef ficient
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n General Description
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. 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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n Applications
l Instrumentation l Portable Electronics l Wireless Devices l PC Peripherals l Battery Powered Widgets
Overcurrent
Shutdown
Thermal
Shutdown
AMP
GND
OUTIN
R1
R2
1.24V
PG
EN
BYP (or ADJ)
AME8817
C3
4.7µF
C1
1µF
GND
OUT
5V
PG
BYP
IN
C2
1nF
EN
OUT
IN
Analog Microelectronics, Inc.
2
1.5A CMOS LDO
AME8817
PRELIMINARY
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n Pin Configuration
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n Ordering Information
OUT
2. PG 6. V
OUT
3. V
IN
7. BYP
4. GND
DDPAK-7 (TO-263) Top View
12
76543 12
76543
OUT
2. PG 6. V
OUT
3. V
IN
7. ADJ
4. GND
AME8817AEDZXXX AME8817BEDZXXX
Package Ty pe
DDPAK-7
1.50 AME8817AEDZ150
AME8817 AEDZ150
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1.80 AME8817AEDZ180
AME8817 AEDZ180
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2.50 AME8817AEDZ250
AME8817 AEDZ250
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3.30 AME8817AEDZ330
AME8817 AEDZ330
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4.75 AME8817AEDZ475
AME8817 AEDZ475
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5.00 AME8817AEDZ500
AME8817 AEDZ500
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ADJ AME8817BEDZADJ
AME8817 BEDZADJ
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Please consult AME sales office or authorized Rep./Distributor for other output voltages, package types or pin configurations.
Output
Voltage
MARKING
Analog Microelectronics, Inc.
3
AME8817
1.5A CMOS LDO
PRELIMINARY
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Absolute Maximum Ratings:
Parameter Maximum Unit
Inpu t V o ltage 8 V
Output Current
PD / (VIN - VO)
mA
Output V ol tage GND - 0.3 to V
IN
+ 0.3 V
ESD Cl assifi catio n B
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R ecom m ended operat ing Condit ions:
Parameter Rating Unit
Ambi ent Temperature Range -40 to +85
o
C
Juncti on Temperature -40 to +125
o
C
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Thermal Information
Maximum Unit
60
o
C / W
2.7 W
150
o
C
300
o
C
Caution: S tress ab ove t he li sted abs ol ut e rat i ng m ay c aus e permanent dam age t o t he device
Max i m um Lead Temperature ( 10 Sec)
Parame ter
Thermal Resistance (
θ
jc
)
Internal Power Dis sipati on (P
D
) (∆T = 10 0oC)
Max i m um Junc t i on Temperature
Analog Microelectronics, Inc.
4
1.5A CMOS LDO
AME8817
PRELIMINARY
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n Electrical Specifications
Parame ter Symb o l Mi n Typ Max Uni ts
Input Voltage V
IN
Note 1 7 V
Output V oltage A c curac y V
O
-1. 5 1. 5 %
1.5V <= V
ONOM
<= 2. 0V 1000
2.0V <V
ONOM
<=2.8V 800
2.8V <V
ONOM
<3.8V 600
Output C urrent I
O
1500 mA
Current Limit I
LIM
1500 2000 mA
Short Circuit Current I
SC
750 1500 mA
Quies cent Current I
Q
35 50
µ
A
Ground Pin Current I
GND
35
µ
A
V
O
< 2.0V -0.15 0.15 %
4.0V > V
O
>= 2.0V -0.1 0. 02 0.1 %
Vo > =4.0V -0.4 0.2 0.4 %
Load Regulation REG
LOAD
0.2 1 %
Over Temerature Shutdown OTS 150
o
C
Over Teme rat ure Hys t e ris is OTH 30
o
C
V
O
Temperature Coefficient TC 30
ppm/
o
C
f=1kHz 50
f=10kHz 20 dB
f=100kHz 15
f=1kHz 75
f=10kHz 55 dB
f=100kHz 30
Co=4.7µF30
Co=100µF20
Co=4.7µF30
Co=100µF20
ADJ Input Bias Current I
ADJ
1mA
ADJ Reference Voltage V
REF
1.223 1. 242 1.261 V
V
EH
2.0 Vin V
V
EL
00.4V
I
EH
0.1
µ
A
I
EL
0.5
µ
A
Shut down S upply Current I
SD
0.5 1
µ
A
Output Under V oltage V
UV
85 % V
O(NOM)
Output O ver Voltage V
OV
115 % V
O(NOM)
PG Leak age Current I
LC
1mA
PG V oltage Rating V
PG
7V
PG V oltage Low V
OL
0.4 V
Note1:V
IN (m in)=VOUT+VDROPOU T
IO=1m A
V
IN=VO
+1 to VO+2
TA = 25oC unless otherwise noted
Test Condition
I
O
=1m A to 1.5A
I
O
=1500m A
V
O=VONOM
-2. 0%
VO<0.4V
I
O
=0mA
I
O
=1m A to 1.5A
Dropout Voltage
See
chart
mV
V
O
>1.2V
V
O
>1.2V
I
O
=1m A to 1500m A
EN Input Threshold
V
IN
=2.7V to 7V
V
IN
=2.7V to 7V
I
O
=100m A CO=4.7µF
Power Sup ply Rejec tion
I
O
=100m A CO=4.7µF
C
BY P
=0.01µF
PSRR
EN Input Bias Current
V
EN=VIN
, VIN=2.7V to 7V
V
EN=VOV
, VIN=2.7V to 7V
V
IN
=5V, VO=0V, VEN<V
EL
I
SINK
=500µA
Note1 Note1
V
PG
=7V
V
O
in regulation
f=10Hz to 100k Hz
I
O
=10m A , C
BY P
=0.01µF
mVrms
Output V oltage Nois e eN
f=10Hz to 100k Hz
I
O
=10m A , C
BY P
=0µF
mVrms
V
DROPOU T
Output V oltage Nois e eN
Power Sup ply Rejec tion
PSRR
Line Regulation REG
LINE
Analog Microelectronics, Inc.
5
AME8817
1.5A CMOS LDO
PRELIMINARY
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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.
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.
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n External Capacitors
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 re- jection, but also makes the output come up slowly . This "Soft" turn-on is desirable in some applications to limit turn-on surges.
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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.
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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.
Analog Microelectronics, Inc.
6
1.5A CMOS LDO
AME8817
PRELIMINARY
34.5
35
35.5
36
36.5
37
37.5
38
38.5
0 0.25 0.5 0.75 1 1.25 1.5
Ground Current vs. Load Current
Ground Current (
µ
µµ
µ
A)
Load Current (mA)
VIN = 2.5V
V
OUT
= 1.5V
30
31
32
33
34
35
36
37
38
39
050100150
Ground Current vs. Temperature
Ground Current (
µ
µµ
µ
A)
Temperature (OC)
I
OUT
= 1.8mA
V
OUT
= 1.8V
V
IN
= 5V
10
15
20
25
30
35
40
45
50
2345678
Ground Current vs. V
IN
Ground Current (
µ
µµ
µ
A)
VIN (V)
I
OUT
= 140mA
V
OUT
= 1.5V
0
0.2
0.4
0.6
0.8
1
1.2
0 0.3 0.6 0.9 1.2 1.5 1.8
Dropout Voltage vs. I
LOAD
Dropout Voltage (V)
I
LOAD
(A)
1.8
1.5
2.0
2.1
2.8
3.3
0
0.2
0.4
0.6
0.8
1
02468
Dropout Voltage vs. V
OUT
Dropout Voltage (V)
V
OUT
(V)
I
LOAD
=1.5A
I
LOAD
=1.0A
I
LOAD
=0.5A
Analog Microelectronics, Inc.
7
AME8817
1.5A CMOS LDO
PRELIMINARY
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
2345678
Short Circuit Current VS. V
IN
Short Circuit Current (A)
VIN (V)
CIN = 4.7µF
C
OUT
= 4.7µF
Overtemperature Shutdown
V
OUT
1V/DIV I
OUT
1A/DIV
Time 100mS/DIV
0V
0A
VIN = 4V
C
IN
= 4.7µF
C
OUT
= 4.7µF
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
2345678
Current Limit Vs. V
IN
Current Limit (A)
VIN (V)
CIN = 4.7µF
C
OUT
= 4.7µF
V
OUT
= 1.8V
Current Limit Response
I
LOAD
1A/DIV V
OUT
1V/DIV
Time 1mS/DIV
I
LIM
I
SC
0A
0V
VIN = 5V
C
IN
= 4.7µF
C
OUT
= 4.7µF
Transient Line Response
V
OUT
(50mV/DIV)
V
IN
(2V/DIV)
Time (20
µµµµ
S/DIV)
CIN = 4.7µF
C
OUT
= 4.7µF
T
R
= TF = 1µS
VOUT = 1.5V
0V
Load Step 40mA to 1.5A
I
LOAD
1A/DIVV
OUT
10mV/DIV
Time 500
µµµµ
S/DIV
0A
CIN = 4.7µF
C
OUT
= 4.7µF
V
IN
= 4.0V
V
OUT
= 1.8V
Analog Microelectronics, Inc.
8
1.5A CMOS LDO
AME8817
PRELIMINARY
0.01
0.1
1
10
100
1000
10000
0 250 500 750 1 000 1250 1500
ESR (
ΩΩ
Ω)
Stable Region
Untested Region
Unstable Region
ILOAD (mA)
CL=5µF
Stability vs. ESR vs I
LOAD
0.01
0.1
1
10
100
1000
10000
0 250 500 750 1000 1250 1500
ILOAD (mA)
Stable Region
Untested Region
Unstable Region
ESR (
ΩΩ
)
CL=2µF
Stability vs. ESR vs I
LOAD
0.001
0.01
0.1
1
10
100
1000
10000
0 250 500 750 1000 1250 1500
Stable Region
Untested Region
Unstable Region
ILOAD (mA)
ESR (
ΩΩ
Ω)
CL=10µF
Stability vs. ESR vs I
LOAD
Analog Microelectronics, Inc.
9
AME8817
1.5A CMOS LDO
PRELIMINARY
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n Package Dimension
TO-263 (DDPAK-7)
MIN MAX MIN MAX A 10.05 10.31 0.396 0.406 B 8.2 8 8.53 0.326 0.336 C 4 .3 1 4 .5 7 0.170 0.180
D 0.6 6 0 .9 1 0.02 6 0.0 3 6
E 1.1 4 1.40 0.045 0.055
G H 14.73 15.75 0.580 0.620 K 1 .4 0 1.6 8 0 .0 00 0.0 6 6
L 0.0 0 0.2 5 0 .0 55 0.0 1 0
M 2.4 9 2 .7 4 0.0 0 0 0 .1 0 8
N 0.4 3 0.5 8 0 .0 9 8 0.0 2 3
P 2.2 9 2.7 9 0.0 1 7 0.1 10
R
0
o
8
?
0
o
8
?
S 2.4 1 2 .6 7 0.0 9 5 0 .1 0 5
W
1.27 ref 0.050 ref
0.25 0.01
SY MBOLS
MILLIMETERS INCHES
Life Support Policy:
These products of Analog Microelectronics, Inc. are not authorized for use as critical components in life-
support 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
Corporate Headquarters Asia Pacific Headquarters
Analog Microelectronics, Inc. AME, Inc.
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www.analogmicro.com
E-Mail: info@analogmicro.com
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