ETC AIC1729

AIC1729
400mA Low Dropout Linear Regulator with
Voltage Detector Function
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FEATURES
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Including MOSFET for VOUT1, LDO for VOUT2,
voltage detector, and shutdown control
DESCRIPTION
The AIC1729 is a low dropout linear regulator
with voltage detection function.
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Low Dropout Voltage of 550mV(Typ.) at 400mA
Output Current (VOUT2).
It can be divided into 4 main function blocks,
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Guaranteed 700mA Output Current for VOUT1
including MOSFET for VOUT1,
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and 400mA for VOUT2.
Low Ground Current at 120µA.
VOUT2 ,voltage detector, and
controls.
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2% Accuracy Output Voltage of VOUT2.
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Current Limit Function.
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Built in Voltage Detector
The detecting voltage of the voltage detector
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Shutdown Control for VOUT1 and VOUT2
is from 3.0V to 4.6V with 0.1V step. And the
LDO
for
two shutdown
Voltage detector can be use to detect Vcc.
output (DOUT) of detecting voltage for Vcc
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APPLICATIONS
with delay time adjustment function to indicate
Voltage Regulator for DVD-ROM and CD-ROM
VCC low. User only adds one external
Drivers.
capacitor to finish it. When VCC pin is under
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Voltage Regulator for HDD and Floppy Drivers.
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Voltage Regulator for circuits with Stepping
the set detection voltage. DOUT pin is logic
low.
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Motor or Servo Motor.
VOUT1 is controlled by SD1 pin. When SD1 is
logic high, the internal MOSFET for VOUT1 will
be switched off, vice versa.
The LDO output voltage (VOUT2) is from 1.8V
to 4.0V with 0.1V step for different application.
It is also controlled by SD2 pin. When SD2 is
logic high, the internal LDO for VOUT2 will be
shutdown, vice versa.
The superior characteristics of the AIC1729
include very low dropout voltage, and 2%
accuracy
output
voltage.
Typical
ground
current remains 120 µ A, from no load to
maximum loading conditions. Dropout voltage
of VOUT2 is 550mV at 400mA output current.
Output current limiting is provided at VOUT1
and VOUT2.
AIC1729 comes in the popular SO8 package.
Analog Integrations Corporation
4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1729-04 032102
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AIC1729
n TYPICAL APPLICATION CIRCUIT
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ORDERING INFORMATION
AIC1729-XX XXCXXX
PIN CONFIGURATION
PACKING TYPE
TB: TUBE
TR: TAPE & REEL (not available for CN package)
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TOP VIEW
VCC
1
8
VOUT1
SD1
2
7
SD2
3
6
CD
4
5
GND
DOUT
VOUT2
LDO OUTPUT VOLTAGE
18: 1.8V
:
:
40: 4.0V
VOLTAGE DETECTOR VOLTAGE
30: 3.0V
:
:
46: 4.6V
* LDO Output Voltage and Voltage Detector
voltage with every 0.1V a step.
Example: AIC1729-3018CN
à 3.0V Voltage Detector Voltage, 1.8V LDO
Output Voltage, in DIP-8 Package Type
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AIC1729
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ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage .............................… ......… … … … .................................... -0.3~8V
Operating Ambient Temperature Range .......… … … ...........… ................... -40°C~ 85°C
Storage Temperature Range ..................… .......… … … … .......................... -65°C~150°C
Thermal Resistance θJA
SOIC Package ....… … ...… … … … … … … … … … … … … … … .......... 100°C/W
SOIC Package (with 3 square inches of Copper) .… … … … … … …
90°C/W
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ELECTRICAL CHARACTERISTICS
(TA=25°C, VIN=5.0V, IOUT1=IOUT2 =400mA,
SD1=SD2=Low, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
120
200
µA
IOUT1=0.1mA~700mA
Ground Current
IOUT2=0.1mA~400mA
VIN= 4.0V~8.0V
Output Voltage Temperature
Coefficiency
(Note 1)
100
PPM/°C
VOUT1
Output MOSFET Resistance
VIN= 5.0V
Current Limit(Note 3)
370
450
mΩ
950
mA
Output Turn-on Rise Delay
100
µS
Output Turn-on Rise Time
1000
µS
SD1 Pin Voltage
700
VSD=Logic”0”
VSD=Logic”1”
0.8
2.4
V
VOUT2 ( 1.8V ~ 4.0V with 0.1V step )
LDO Output Voltage
No Load
Line Regulation
IL=1mA,VIN=4.0V~8.0V
Load Regulation
VIN=5V,IL=0.1mA~400mA
VSET ×
0.98
(Note 2)
Current Limit
(Note 3)
VSET
400
VSET ×
1.02
V
3
10
mV
50
90
mV
650
mA
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AIC1729
n
ELECTRICAL CHARACTERISTICS
PARAMETER
TEST CONDITIONS
VOUT ≥ 3.3V
Dropout Voltage
(Note 4)
2.5V ≤VOUT<3.3V
VOUT < 2.5V
SD2 Pin Voltage
(Continued)
MIN.
TYP.
MAX.
IL=100mA
140
200
IL=200mA
280
350
IL=300mA
420
500
IL=400mA
550
700
IL=100mA
250
300
IL=200mA
420
500
IL=300mA
600
700
IL=400mA
780
900
IL=100mA
700
800
IL=200mA
880
950
IL=300mA
1050
1150
IL=400mA
1220
1400
VSD=Logic”0”
VSD=Logic”1”
0.8
2.4
UNIT
mV
V
Voltage Detector ( 3.0V ~ 4.6V with 0.1V step )
VDSET ×
Detect Voltage(VDET)
0.98
Delay Time
VDSET ×
1.02
VDET ×
Detect Threshold Hysteresis
VDOUT
VDSET
V
1.05
When VDET is Detected
When VDET is not Detected
CD Pin Open
0.6
1.65
1
V
3
V
mS
Note 1: Guaranteed by design.
Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low ON time.
Note 3: Current limit is measured by pulsing a short time.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops
100mV below the value measured with a 1V differential.
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AIC1729
n TYPICAL PERFORMANCE CHARACTERISTICS
3.32
100
Load regulation (mV)
3.30
VOUT (V)
3.28
3.26
3.24
80
60
40
20
3.22
0
3.20 0
100
200
300
400
500
600
0
100
200
Loading Current (mA)
Fig. 1 Output voltage vs. Loading Current
Fig. 3
300
400
500
Load Current (mA)
Fig. 2
Line Transient
Fig. 4
Load Regulation
Load Transient
0.40
0.35
0.38
0.36
Switch Ron (Ω)
Switch Ron (Ω)
0.34
0.33
0.32
0.34
0.32
0.30
0.28
0.26
I_load=500mA
0.24
0.31
0.22
0.30
0
200
400
600
800
1000
0.20
-40
-20
Fig. 5 Switch Ron vs. Loading current (mA)
0
20
40
60
80
Temperature (C)
Loading Current (mA)
Fig. 6
Switch Ron vs. Temperature
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AIC1729
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
3.40
I_load=400mA
I_load=250mA
VOUT (V)
3.35
I_load=100mA
3.30
I_load=0mA
3.25
-40
-20
0
20
40
60
80
100
Temperature (C)
Fig. 8
Fig. 7 Output voltage vs. Temperature
Output Turn-on Rise Time
500
V_det=4.5 V
Detector Voltage
Delay Time (ms)
400
DOUT
300
200
100
0
0
50
100
150
200
250
300
350
400
External Capacitor (nF)
Fig. 9
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Built-in Delay Time Waveform
Fig. 10 Delay Time vs. External Capacitor
BLOCK DIAGRAM
VCC
VOUT1
CD
DOUT
GND
Voltage
Detector
SD
Control
SD1
1.8~4.0V
LDO
VOUT2
SD
Control
SD2
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AIC1729
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PIN DESCRIPTION
PIN 1: VCC-
This pin is the main input supply
PIN 4: CD-
for the IC, normally 5V
time by attaching a capacitor
PIN 2: VOUT1- This pin is the voltage output
which
is
directly
PIN 3: SD1-
connected
via
internal
This pin is to determine delay
to
PIN 5: DOUT-
Vcc
This
pin
is
voltage
detector
output, pulled low when VIN
MOSFET
detected
switch, normally 5V
PIN 6: GND-
IC ground pin
VOUT1 shutdown pin. Logic high
PIN 7: SD2-
VOUT2 shutdown pin. Logic high
input for disabling the internal
MOS Switch.
input for disabling LDO output.
PIN 8: VOUT2- This pin is 3.3V LDO voltage
output
PHYSICAL DIMENSIONS
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8 LEAD PLASTIC SO (unit: mm)
D
H
E
e
C
B
SYMBOL
MIN
MAX
A
1.35
1.75
A1
0.10
0.25
B
0.33
0.51
C
0.19
0.25
D
4.80
5.00
E
3.80
4.00
e
A
A1
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L
1.27(TYP)
H
5.80
6.20
L
0.40
1.27
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AIC1729
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8 LEAD PLASTIC DIP (unit: mm)
D
E1
E
A2
A1
C
L
e
MIN
MAX
A1
0.381
—
A2
2.92
4.96
b
0.35
0.56
C
0.20
0.36
D
9.01
10.16
E
7.62
8.26
E1
6.09
7.12
e
eB
b
SYMBOL
2.54 (TYP)
eB
—
10.92
L
2.92
3.81
Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any
circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties
that may result from its use. We reserve the right to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or
systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose
failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably
expected to result in a significant injury to the user.
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