- 1 -
December. 2002
(Rev.0)
www.interpionsemi.com
IP1531
TRIPLE OUTPUT VOLTAGE LDO REGULATOR
The IP1531 is a triple output voltage LDO regulator
which can provide up to 500mA of output current.
The IP1531 consists of 1-fixed 3.3V and 2-adjustable
regulators.
- 1-Fixed 3.3V LDO regulator with internal NPN TR.
- 2-Adjustable LDO regulators with internal NPN TR.
- Built-in TSD circuit.
- Built-in current limit circuit.
- Built-in over voltage protection circuit.
- Output trimmed to +/-3% Tolerance
DESCRIPTION
FEATURES
Device
Package
Operating
Temp
IP1531
14SOPH-8L
-35
O
C ~ +85
O
C
ORDERING INFORMATION
14SOPH-8L
BLOCK DIAGRAM
VOUT1
VIN
ON/OFF
VOUT2
PGND
ADJ2
1
2
6
4
5
3
VOUT3
7
PGND
Vref
TSD
OVP
OCL
ADJ3
On/off
control SW
Shutdown
- 2 -
December. 2002
(Rev.0)
www.interpionsemi.com
IP1531
TRIPLE OUTPUT VOLTAGE LDO REGULATOR
PIN DESCRIPTIONS
NO
SYMBOL
I/O
DESCRIPTION
1
VIN
I
Input Supply Voltage
2
ON/OFF
I
ON/OFF control
3
VOUT1
O
Regulator 1 Output (3.3V fixed)
4
ADJ2
I
Regulator 2 Adjustable Pin
5
VOUT2
O
Regulator 2 Output (Adjustable)
6
VOUT3
O
Regulator 3 Output (Adjustable)
7
ADJ3
I
Regulator 3 Adjustable Pin
8
PGND
-
Power Ground
PIN CONNECTIONS
VOUT1
VIN ON/OFF
VOUT2
PGND
ADJ2
VOUT3
PGND
ADJ3
1
2
6
4
5
3
7
IP1531
- 3 -
December. 2002
(Rev.0)
www.interpionsemi.com
IP1531
TRIPLE OUTPUT VOLTAGE LDO REGULATOR
CHARACTERISTICS
SYMBOL
VALUE
UNIT
Maximum supply voltage
Vccmax
10
V
Input voltage
Vinmax
10
V
Power dissipation
Pd
3.0*
W
Operating temperature
Topr
-35 ~ +85
O
C
Storage temperature
Tstr
-55 ~ +150
O
C
Note>
1. When mounted on 100mm X 100mm X 1mm PCB (Phenolic resin material).
2. Power dissipation reduces 24mW/
O
C for using above Ta=25
O
C
3. Do not exceed Pd and SOA.
POWER DISSIPATION CURVE
Power Dissipation (W)
Ambient Temperature (C)
25 50 75 100 125 150 175
0
1
2
3
RECOMMENDED OPERATING CONDITIONS
CHARACTERISTICS
SYMBOL
VALUE
UNIT
Input voltage
VIN
4.5 ~ 6.0
V
SOA
ABSOLUTE MAXIMUM RATINGS(TA=25
O
C)
4
- 4 -
December. 2002
(Rev.0)
www.interpionsemi.com
IP1531
TRIPLE OUTPUT VOLTAGE LDO REGULATOR
ELECTRICAL CHARACTERISTICS
Characteristics
Symbol
Condition
Min.
Typ.
Max.
Units
Quiescent current
Icc
Vcc=5V, No-Load
-
7
12
mA
OVP Detecting Voltage
Vovp
Vcc=Variable
6.5
-
-
V
LDO REGULATOR 1 (3.3V FIXED TYPE)
Output Voltage
Vout1
Io=10mA
3.2
3.3
3.4
V
Line Regulation
dVline1 Vin=4.5~6V, Io=10mA
-
0.01
0.2
%
Load Regulation
dVload 1
Ta=25
O
C
Vin=5V, 10mA < Io < 500mA
-
0.4
0.8
%
Dropout voltage
Vdrop1
Io=500mA
-
1.1
1.3
V
Ripple rejection
RR1
F=120Hz, Co=10uF Tantalum
Vin-Vout=2V, Io=250mA
60
70
-
dB
Current limit
*Note
Ilimit1
-
500
-
-
mA
Temperature stability
Temp1
-
-
0.5
-
%
LDO REGULATOR 2 (ADJUSTABLE TYPE)
Output Voltage
Vout2
Io=10mA
Vref
-
Vin-
1.5V
V
Line Regulation
dVline2 Vin=4.5~6V, Io=10mA
-
0.01
0.4
%
Load Regulation
dVload2
Ta=25
O
C
Vin=5V, 10mA < Io < 400mA
-
0.4
0.8
%
Dropout voltage
Vdrop2
Io=400mA
-
1.1
1.3
V
Ripple rejection
RR2
F=120Hz, Co=10uF Tantalum
Vin-Vout=2V, Io=200mA
60
70
-
dB
Current limit
*Note
Ilimit2
Vin-Vout=3.0V
400
-
-
mA
Temperature stability
Temp2
-
-
0.5
-
%
Reference voltage
Vref
-
1.212
1.25
1.288
V
Adjust pin current
Iadj 2
-
-
0.1
-
uA
Minimum load current
Ilmin2
-
10
-
-
mA
( Vin= 5V, Co=10uF, Ta = 25
O
C, unless otherwise specified.)
- 5 -
December. 2002
(Rev.0)
www.interpionsemi.com
IP1531
TRIPLE OUTPUT VOLTAGE LDO REGULATOR
ELECTRICAL CHARACTERISTICS
( Vin= 5V, Co=10uF, Ta = 25
O
C, unless otherwise specified.)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Units
LDO REGULATOR 3 (ADJUSTABLE TYPE)
Output Voltage
Vout3
Io=10mA
Vref
-
Vin-
1.5V
V
Line Regulation
dVline3
Vin=4.5~6V,Io=10mA
-
0.01
0.4
%
Load Regulation
dVload3
Ta=25
O
C
Vin=5V, 10mA < Io < 400mA
-
0.4
0.8
%
Dropout voltage
Vdrop3
Io=400mA
-
1.1
1.3
V
Ripple rejection
RR3
F=120Hz, Co=10uF Tantalum
Vin-Vout=2V, Io=200mA
60
70
-
dB
Current limit
*Note
Ilimit3
Vin-Vout=3.0V
400
-
-
mA
Adjust pin current
Iadj 3
-
-
0.1
-
uA
Minimum load current
Ilmin3
-
10
-
-
mA
Temperature stability
Temp3
-
-
0.5
-
%
On voltage
Von
Vout=Enabled
-
-
0.8
V
Off voltage
Voff
Vout=Disabled
2.0
-
-
V
ON/OFF CONTROL PART
* Note
Don't exceed following current limit.
( Iout1 : 500 mA, Iout2 : 400 mA, Iout3 : 400 mA )
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