Anachip AP13818W 300ma low-noise cmos ldo Datasheet

AP138
300mA Low-Noise CMOS LDO
„ Features
„ General Descriptions
- Very low dropout voltage
- Low current consumption: Typ.30µA, Max. 35µA
- Output voltage: 1.8V, 2.5V, 2.8V, 3.0V and 3.3V
- High accuracy output voltage: ±1.5%
- Guaranteed 300mA output
- Input range up to 7.0V
- Thermal shutdown
- Current limiting
- Stability with low ESR capacitors
- Factory pre-set output voltages
- Low temperature coefficient
- Pb-free package: SOT23-5L
The AP138 is a positive voltage linear regulator
utilizing CMOS technology. The features that
include low quiescent current (30µA typ.), low
dropout voltage, and high output voltage accuracy,
make it ideal for battery applications. EN input
connected to CMOS has low bias current. The
space-saving SOT23-5L package is attractive for
“Pocket” and “Hand Held” applications.
This rugged device has both thermal shutdown, and
current limit protections to prevent device failure
under the “Worst” operating conditions.
In a low noise, regulated supply application, a
1000pF capacitor is necessary to be placed in
between Bypass and Ground.
„ Applications
- Battery-powered devices
- Personal communication devices
- Home electric/electronic appliances
- PC peripherals
The AP138 is stable with a low ESR output
capacitor of 1.0µF or greater.
„ Pin Assignments
„ Pin Descriptions
(Top View)
VOUT
BYP
5
Pin
Name
VIN
GND
EN
BYP
VOUT
4
AP138
1
VIN
2
Pin
No.
1
2
3
4
5
Function
Power Supply
Ground
Enable Pin
Bypass Signal Pin
Output
3
GND EN
SOT23-5
„ Ordering Information
AP138 XX X X
Output voltage
Package
18: 1.8V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
W : SOT23-5L
Packing
Blank: Tube
A: Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.0 Oct 29, 2004
1/7
AP138
300mA Low-Noise CMOS LDO
„ Block Diagram
VIN
VOUT
Current
Limit
1uA
Thermal
Shutdown
R1
EN
-
BYP
AMP
+
Vref
R2
GND
„ Absolute Maximum Ratings
Symbol
VCC
IOUT
VOUT
TA
TJ
Parameter
Input Voltage
Output Current
Output Voltage
ESD Classification
Ambient Temperature Range
Junction Temperature Range
Rating
+7
PD/ (VIN-VO)
GND - 0.3 to VIN+ 0.3
B
-40 to +85
-40 to +125
Unit
V
mA
V
Maximum
160
250
150
300
Unit
ºC/W
mW
ºC
ºC
ºC
ºC
„ Thermal Information
Symbol
θjc
PD
TJ
TLead
Parameter
Thermal Resistance
Internal Power Dissipation (∆T=100 ºC)
Maximum Junction Temperature
Maximum Lead Temperature (10 sec)
SOT23-5L
SOT23-5L
Anachip Corp.
www.anachip.com.tw
Rev. 1.0
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Oct 29, 2004
AP138
300mA Low-Noise CMOS LDO
„ Electrical Characteristics
(TA=+25ºC, unless otherwise noted.)
Symbol
Parameter
Test Conditions
VIN
Input Voltage
VOUT
Output Voltage Accuracy IO=1mA to 300mA
1.2V<VO(NOM)
≤ 2.0V
IO=1mA to 300mA,
VDROPOUT Dropout Voltage
2.0V<VO(NOM)
VOUT=VO(NOM)-1.5%
≤ 2.5V
2.5V<VO(NOM)
IOUT
Output Current
VOUT > 1.2V
ILIMIT
Current Limit
VOUT > 1.2V
IQ
Quiescent Current
IO=0mA
IGND
Ground Pin Current
IO=1mA to 300mA
REGLINE Line Regulation
IOUT=5mA, VIN=VOUT+1 to VOUT+2
REGLOAD Load Regulation
IO=1mA to 300mA
Over Temperature
OTS
Shutdown
Over Temperature
OTH
Hysteresis
VOUT Temperature
TC
Coefficient
f=1KHz
I =100mA,
PSRR Power Supply Rejection O
f=10KHz
CO=2.2µF ceramic
f=100KHz
f=1KHz
IO=100mA,
PSRR Power Supply Rejection CO=2.2µF ceramic,
f=10KHz
CBYP=0.01µF
f=100KHz
CO=2.2uF
f=10Hz to 100kHz,
eN
Output Voltage Noise
IO=10mA, CBYP=0µF
CO=100uF
CO=2.2uF
f=10Hz to 100kHz,
eN
Output Voltage Noise
IO=10mA, CBYP=0.01µF CO=100uF
Shutdown Supply
ISD
VIN=5.0V, VOUT=0V, VEN < VEL
Current
IEH
VEN=VIN, VIN=2.6V to 7V
EN Input Bias Current
IEL
VEN=0V, VIN=2.6V to 7V
VEH
VIN=2.6V to 7V
EN Input Threshold
VEL
VIN=2.6V to 7V
Min.
Note 1
-1.5
Typ.
-
Max.
7
1.5
Unit
V
%
-
-
1300
-
-
800
300
300
-0.1
-
450
30
30
0.02
0.2
300
35
50
0.1
1
-
150
-
o
C
-
30
-
o
C
-
40
-
-
60
50
40
75
55
30
30
20
30
20
-
-
2.0
3.0
µA
2
0
2.0
-
0.1
3.0
VIN
0.4
µA
µA
V
V
mV
mA
mA
µA
µA
%
%
ppm/ oC
dB
dB
µVrms
µVrms
Note 1. : VIN(MIN)=VOUT+VDROPOUT
„ Typical Application
VIN
IN
VOUT
OUT
AP138
BYP
C1
1uF
C2
1nF
GND
EN
C3
1uF
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Oct 29, 2004
AP138
300mA Low-Noise CMOS LDO
„ Typical Performance Characteristics
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AP138
300mA Low-Noise CMOS LDO
„ Typical Performance Characteristics (Continued)
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AP138
300mA Low-Noise CMOS LDO
„ Function Description
Enable
The enable pin normally floats high. When actively,
pulled low, the PMOS pass transistor shut off, and
all internal circuits are powered down. In this state,
the quiescent current is less than 2µA. This pin
behaves much like an electronic switch.
The AP138 of CMOS regulators contain a PMOS
pass transistor, voltage reference, error amplifier,
over-current protection, thermal shutdown.
The P-channel pass transistor receives data from
the error amplifier, over-current protection, 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
300mA. During thermal shutdown, the output
voltage remains low. Normal operation is restored
o
when the junction temperature drops below 120 C.
External Capacitor
The AP138 is stable with a low ESR output
capacitor to ground of 1.0µF or greater. It can keep
stable even with higher ESR capacitors. A second
capacitor is recommended between the input and
ground to stabilize VIN. The input capacitor should
be larger than 0.1µF to have a beneficial effect. All
capacitors should be placed in close proximity to
the pins. A “quiet” ground termination is desirable.
The AP138 switches from voltage mode to current
mode when the load exceeds the rated output
current. This prevents over-stress.
„ Marking Information
4
38 XYW
1
Appendix
Identification
Code
D
K
N
P
S
7
5
2
3
X : Identification code
(See Appendix)
Y : Year: 0-9
W : Week: A~Z: 01~26
a~z : 27~52
. : 53
SOT23-5L
Anachip Corp.
www.anachip.com.tw
Output version
AP138-1.8V
AP138-2.5V
AP138-2.8V
AP138-3.0V
AP138-3.3V
Rev. 1.0
6/7
Oct 29, 2004
AP138
300mA Low-Noise CMOS LDO
„ Package Information
Package Type: SOT23-5L
D
e1
θ 1(4x)
4
5
E1
A
E
0.10 C
5x
A2
Seating Plane
A1
1
2
θ 2(4x)
3
b
e
With
Plating
b1
C
C1
Gauge Plane
0.25 mm
θ
Base
Metal
L
b
Symbol
L1
Dimensions In Millimeters
Dimensions In Inches
Min.
Nom.
Max.
Min.
Nom.
Max.
A
1.05
1.20
1.35
0.041
0.047
0.053
A1
0.05
0.10
0.15
0.002
0.004
0.006
A2
1.00
1.10
1.20
0.039
0.043
0.047
b
0.25
-
0.55
0.010
-
0.022
b1
0.25
0.40
0.45
0.010
0.016
0.018
c
0.08
-
0.20
0.003
-
0.008
c1
0.08
0.11
0.15
0.003
0.004
0.006
D
2.70
2.85
3.00
0.106
0.112
0.118
E
2.60
2.80
3.00
0.102
0.110
0.118
E1
1.50
1.60
1.70
0.059
0.063
0.067
L
0.35
0.45
0.55
0.014
0.018
0.022
L1
0.60 Ref.
0.024 Ref.
e
0.95 Bsc.
0.037 Bsc.
e1
1.90 Bsc.
0.075 Bsc.
θ
0o
5o
10o
0o
5o
10o
θ1
3o
5o
7o
3o
5o
7o
θ2
o
o
o
o
6
8
o
10
Anachip Corp.
www.anachip.com.tw
6
8
10o
Rev. 1.0
7/7
Oct 29, 2004
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