AME AME8808AEGT 750ma cmos ldo Datasheet

Analog Microelectronics, Inc.
AME8808
750mA CMOS LDO
n General Description
n Features
The AME8808 family of positive, linear regulators feature
low quiescent current (30µA typ.) with low dropout voltage, making them ideal for battery applications. The
space-saving SOT-223 and DPAK-2 packages are attractive for "Pocket" and "Hand Held" applications.
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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.
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The AME8808 is stable with an output capacitance of
2.2µF or greater.
Very Low Dropout Voltage
Guaranteed 750mA Output
Accurate to within 1.5%
30µA Quiescent Current
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Space-Saving SOT-223 and DPAK-2 Package
Factory Pre-set Output Voltages
Low Temperature Coefficient
n Applications
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n Functional Block Diagram
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IN
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OUT
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Instrumentation
Portable Electronics
Wireless Devices
Cordless Phones
PC Peripherals
Battery Powered Widgets
Electronic Scales
Overcurrent
Shutdown
n Typical Application
R1
Thermal
Shutdown
OUT
IN
IN
AMP
OUT
GND
5V
V ref=1.215V
AME8808
C1
C2
1µF
2.2µF
R2
GND
1
Analog Microelectronics, Inc.
750mA CMOS LDO
AME8808
n Pin Configuration
S O T -223 T op V iew
1
2
D P A K -2 T op V iew
1. GND
1. GND
2. VOUT
2. VOUT (Connected with heat sink)
3. VIN
3. VIN
1
3
2
3
n Ordering Information
P a rt N u m b e r
M a rk in g
O u tp u t V o lta g e
P ackage
O p e ra tin g T e m p . R a n g e
A ME 8808A E GT
A E Tyw w
3 .3 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808B E GT
A E U yw w
3 .0 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808C E GT
A E V yw w
2 .8 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808D E GT
A E W yw w
2 .5 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808E E GT
A E X yw w
3 .8 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808FE GT
A E Yyw w
3 .6 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808GE GT
A E Zyw w
3 .5 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808HE GT
A F A yw w
2 .7 V
S O T-2 2 3
-4 0 C to + 8 5 C
A M E 8 8 0 8 IE G T
A F B yw w
3 .4 V
S O T-2 2 3
-4 0 C to + 8 5 C
A M E 8808JE GT
A G U yw w
2 .8 5 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808K E GT
A H W yw w
3 .7 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808LE GT
A J G yw w
1 .5 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808M E GT
A J H yw w
1 .8 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808NE GT
A K U yw w
2 .9 V
S O T-2 2 3
-4 0 C to + 8 5 C
A ME 8808OE GT
A K V yw w
3 .1 V
S O T-2 2 3
-4 0 C to + 8 5 C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
P le a s e c o ns ult A M E s a le s o ffic e o r a utho rize d R e p ./D is trib uto r fo r o the r o utp ut vo lta g e
a nd p a c k a g e typ e a va ila b ility.
2
Analog Microelectronics, Inc.
AME8808
750mA CMOS LDO
n Ordering Information (contd.)
Part Number
AME8808AECS
AME8808BECS
AME8808CECS
AME8808DECS
AME8808EECS
AME8808FECS
AME8808GECS
AME8808HECS
AME8808IECS
AME8808JECS
AME8808KECS
AME8808LECS
AME8808MECS
AME8808NECS
AME8808OECS
Marking
AME8808
AECS
yyww
AME8808
BECS
yyww
AME8808
CECS
yyww
AME8808
DECS
yyww
AME8808
EECS
yyww
AME8808
FECS
yyww
AME8808
GECS
yyww
AME8808
HECS
yyww
AME8808
IECS
yyww
AME8808
JECS
yyww
AME8808
KECS
yyww
AME8808
LECS
yyww
AME8808
MECS
yyww
AME8808
NECS
yyww
AME8808
OECS
yyww
Output Voltage Package Operating Temp. Range
3.3V
DPAK-2
-40O C to +85OC
3.0V
DPAK-2
-40O C to +85OC
2.8V
DPAK-2
-40O C to +85OC
2.5V
DPAK-2
-40O C to +85OC
3.8V
DPAK-2
-40O C to +85OC
3.6V
DPAK-2
-40O C to +85OC
3.5V
DPAK-2
-40O C to +85OC
2.7V
DPAK-2
-40O C to +85OC
3.4V
DPAK-2
-40O C to +85OC
2.85V
DPAK-2
-40O C to +85OC
3.7V
DPAK-2
-40O C to +85OC
1.5V
DPAK-2
-40O C to +85OC
1.8V
DPAK-2
-40O C to +85OC
2.9V
DPAK-2
-40O C to +85OC
3.1V
DPAK-2
-40O C to +85OC
Please consult AME sales office or authorized Rep./Distributor for other output voltage
and package type availability.
3
Analog Microelectronics, Inc.
750mA CMOS LDO
AME8808
n Absolute Maximum Ratings
Pa ra m e te r
Maximum
Unit
Input Voltage
8
V
Output Current
1
A
GND - 0.3 to V D D + 0.3
V
Input, Output Voltage
ESD Classification
B
n Recommended Operating Conditions
Parameter
Rating
Unit
Supply Voltage
4.5 to 5.5
V
Ambient Temperature Range
-40 to +85
o
-40 to +125
o
Junction Temperature
C
C
n Thermal Information
Parameter
Maximum
SOT-223
160
Thermal Resistance (θjc )
o
DPAK-2
60
SOT-223
625
Internal Power Dissipation (PD )
(∆ T = 100oC)
Unit
C/W
mW
DPAK-2
3,000
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
4
Analog Microelectronics, Inc.
AME8808
750mA CMOS LDO
n Electrical Specifications
TA = 25 o C unless otherwise noted
Parameter
Symbol
Input Voltage
VIN
Output Voltage Accuracy
VO
Dropout Voltage
VDROPOUT
Test Condition
Min
IO=1mA
Typ
Max
Units
Note 1
8
V
-1.5
1.5
%
1.5V<VO(NOM)<=2.0V
IO=750mA
VO=VONOM -2.0%
1400
See
chart
2.0V<VO(NOM)<=2.8V
2.8V<VO(NOM)<3.8V
1000
mV
750
Output Current
IO
VO>1.2V
750
Current Limit
ILIM
VO>1.2V
750
Short Circuit Current
ISC
VO<0.8V
300
600
mA
Quiescent Current
IQ
IO=0mA
30
50
µA
Ground Pin Current
IGND
IO=1mA to 750mA
30
50
µA
Line Regulation
REGLINE
0.15
%
0.02
0.1
%
Load Regulation
REGLOAD
0.2
1
%
Over Temerature Shutdown
OTS
IO=5mA
VO < 2.0V
VIN=VO+1 to VO+2
VO >= 2.0V
IO=1mA to 750mA
mA
850
150
o
o
Over Temerature Hysterisis
OTH
30
VO Temperature Coefficient
TC
30
Power Supply Rejection
PSRR
Output Voltage Noise
eN
IO=100mA
CO=2.2mF
f=10Hz to 100kHz
IO=10mA,CBYP=0mF
mA
f=1kHz
50
f=10kHz
20
f=100kHz
15
Co=2.2mF
30
Co=100mF
20
C
C
ppm/oC
dB
mVrms
Note1:VIN(min)=VOUT+VDROPOUT
5
Analog Microelectronics, Inc.
750mA CMOS LDO
AME8808
n Detailed Description
The AME8808 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 750mA. During thermal
shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120oC.
The AME8808 switches from voltage mode to current mode
when the load exceeds the rated output current. This
prevents over-stress. The AME8808 also incorporates
current foldback to reduce power dissipation when the
output is short circuited. This feature becomes active
when the output drops below 0.8 volts, and reduces the
current flow by 65%. Full current is restored when the
voltage exceeds 0.8 volts.
n External Capacitors
The AME8806/8809 is stable with an output capacitor
to ground of 2.2µF 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.
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.
6
n Enable
The Enable pin normally floats high. When actively,
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.
Analog Microelectronics, Inc.
AME8808
750mA CMOS LDO
Load Step ( 1mA-600mA)
Ground Current vs. Input Voltage
Vo(10mV/DIV)
45
35
85 O C
30
25
Output
C L =2.2µF
CIN=2.2µF
25 O C
20
IL(200mA/DIV)
µA)
Ground Current (µ
40
15
10
5
IL o a d
0
0
0
1
2
3
4
5
6
7
8
TIME ( 20mS/DIV)
Input Voltage (V)
Drop Out Voltage vs. Output Voltage
Power Supply Rejection Ratio
0
-10
0.25
IL O A D = 6 0 0 m A
-20
0.2
PSRR (dB)
Drop Out Voltage (V)
0.3
0.15
0.1
C L =2.2 µF Tantalum
C B Y P =0
100mA
-30
-40
-50
10mA
100mA
-60
0.05
-70
0
2
2.5
3
3.5
4
4.5
5
5.5
-80
1.0E+01
Output Voltage (V)
DPAK-2
With HS capable of twice θjc
Input-Output Voltage Differential (V)
1.0E+05
1mA
1.0E+07
VIN(1V/DIV)
Line Transient Response
VOUT (10mV/DIV)
Output Current (mA)
SOT-223
1.0E+03
100 µA
Frequency (Hz)
Safe Operating Area
75 O C rise
100 µA
C L O A D =2.2µF
IL O A D = 1 m A
V O U T D C =3.3V
V I N D C =4.5V
TIME (200mS/DIV)
7
Analog Microelectronics, Inc.
750mA CMOS LDO
AME8808
Noise Measurement
I OUT (200mA/DIV)
0
R L O A D =6.6Ω
VOUT (1V/DIV)
Vo (1mV/ DIV)
CL = 2.2µF
NO FILTER
Overtemperature Shutdown
0
TIME (0.5Sec/DIV)
TIME (20mS/DIV)
Short Circuit Response
TIME (2mS/DIV)
8
I OUT (200mV/DIV)
C L O A D =2.2µF
C I N =1.0µF
R L O A D =3.3Ω
V O U T N O M =3.3V
C L O A D =2.2µF
C IN = 1µF
R L O A D < 1 0 0 mΩ
V OUT (1V/DIV)
IOUT (200mA/DIV) VOUT (1V/DIV)
Current Limit Response
TIME (2mS/DIV)
Analog Microelectronics, Inc.
AME8808
750mA CMOS LDO
n Package Dimension
TO-252 (DPAK)
SYMBOLS
A
B
C
D
E
F
G
H
I
J
K
L
MILLIMETERS
MIN
MAX
0.45
0.58
1.60
1.95
0.51
0.45
0.60
6.40
6.80
5.40
5.80
2.20
2.85
* 2.30
0.90
0.97
5.20
5.50
0.89
2.03
INCHES
MIN
MAX
0.0177
0.023
0.06
0.0768
0.02
0.0177
0.0236
0.252
0.2677
0.2126
0.2283
0.0866
0.1122
* 0.0906
0.0354
0.038
0.20
0.22
0.035
0.08
* : Typical value
NOTES :
1. CONTROLLING DIMENSION : MILLIMETERS.
2. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS
MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE
MATERIAL.
TO-252 (DPAK)
SYMBOLS
A
B
C
D
E
F
G
H
I
J
K
L
MILLIMETERS
MIN
MAX
0.45
0.58
1.60
1.95
0.51
0.45
0.60
6.40
6.80
5.40
5.80
2.20
2.85
* 2.30
0.90
0.97
5.20
5.50
0.89
2.03
INCHES
MIN
MAX
0.0177
0.023
0.06
0.0768
0.02
0.0177
0.0236
0.252
0.2677
0.2126
0.2283
0.0866
0.1122
* 0.0906
0.0354
0.038
0.20
0.22
0.035
0.08
* : Typical value
NOTES :
1. CONTROLLING DIMENSION : MILLIMETERS.
2. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS
MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE
MATERIAL.
9
Analog Microelectronics, Inc.
750mA CMOS LDO
AME8808
n Package Dimension
SOT-223
α
A
MILLIMETERS
MIN
MAX
1.50
1.80
INCHES
MIN
MAX
0.0591
0.0709
A1
B
B1
C
0.02
0.60
2.895
0.24
0.0008
0.0236
0.1140
0.0094
D
E
e
e1
H
6.299
6.706
3.30
3.708
2.30 BSC
4.60 BSC
6.70
7.30
0.2480
0.2640
0.1299
0.1460
0.090 BSC
0.181 BSC
0.2638
0.2874
L
L1
L2
0.91 MIN
2.00 MAX
0.06 BSC
0.0360 MIN
0.0787 MAX
0.0024 BSC
SYMBOLS
α
10
°
0
0.10
0.838
3.15
0.381
°
10
°
0
0.0039
0.033
0.1240
0.0150
°
10
www.analogmicro.com
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: 2006-DS8808-C
Corporate Headquarters
Asia Pacific Headquarters
Analog Microelectronics, Inc.
AME, Inc.
3100 De La Cruz Blvd. Suite 201
Santa Clara, CA. 95054-2046
2F, 187 Kang-Chien Road, Nei-Hu District
Taipei 114, Taiwan, R.O.C.
Tel : (408) 988-2388
Fax: (408) 988-2489
Tel : 886 2 2627-8687
Fax : 886 2 2659-2989
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