December. 2002
(Rev.0)
- 1 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
14SOPH-8L
The IP1525 is a dual output voltage LDO regulator
which can provide up to 500mA of output current.
The IP1525 consists of 2-adjustable regulators.
DESCRIPTION
- 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
FEATURES
Device
Package
Operating Temp
SAC1525
14SOPH-8L
-35
O
C ~ +85
O
C
ORDERING INFORMATION
BLOCK DIAGRAM
N/C
VIN
ON/OFF
VOUT1
PGND
ADJ1
1
2
6
4
5
3
VOUT2
7
PGND
Vref
TSD
OVP
OCL
ADJ2
On/off
control SW
Shutdown
December. 2002
(Rev.0)
- 2 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
PIN DESCRIPTIONS
NO
SYMBOL
I/O
DESCRIPTION
1
VIN
I
Input Supply Voltage
2
ON/OFF
I
ON/OFF control
3
N/C
-
No Connection
4
ADJ1
I
Regulator 1 Adjustable Pin
5
VOUT1
O
Regulator 1 Output (Adjustable)
6
VOUT2
O
Regulator 2 Output (Adjustable)
7
ADJ2
I
Regulator 2 Adjustable Pin
8
PGND
-
Power Ground
PIN CONNECTIONS
N/C
VIN ON/OFF
VOUT1
PGND
ADJ1
VOUT2
PGND
ADJ2
1
2
6
4
5
3
7
IP1525
December. 2002
(Rev.0)
- 3 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
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
RECOMMENDED OPERATING CONDITIONS
CHARACTERISTICS
SYMBOL
VALUE
UNIT
Input voltage
VIN
4.5 ~ 6.0
V
ABSOLUTE MAXIMUM RATINGS(TA=25
O
C)
Power Dissipation (W)
Ambient Temperature (C)
25 50 75 100 125 150 175
0
1
2
3
SOA
4
December. 2002
(Rev.0)
- 4 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
ELECTRICAL CHARACTERISTICS
Characteristics
Symbol
Condition
Min.
Typ.
Max.
Units
Quiescent current
Icc
Vcc=5V, No-Load
-
7
12
mA
OVP Dectecting Voltage
Vovp
Vcc=Variable
6.5
-
-
V
Reference voltage
Vref
-
1.212
1.25
1.288
V
LDO REGULATOR 1 (ADJUSTABLE TYPE)
Output Voltage
Vout1
Io=10mA
Vref
-
Vin-
1.5V
V
Line Regulation
dVline1 Vin=4.5~6V, Io=10mA
-
0.01
0.2
%
Load Regulation
dVload1
Ta=25
O
C
Vin=5V, 10mA < Io < 400mA
-
0.4
0.8
%
Dropout voltage
Vdrop1
Io=400mA
-
1.1
1.3
V
Ripple rejection
RR1
F=120Hz, Co=10uF Tantalum
Vin-Vout=2V, Io=200mA
60
70
-
dB
Current limit
*Note
Ilimit1
Vin-Vout=3.0V
500
-
-
mA
Adjust pin current
Iadj 1
-
-
0.1
-
uA
Minimum load current
Ilmin1
-
10
-
-
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
0.2
%
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
500
-
-
mA
Adjust pin current
Iadj 2
-
-
0.1
-
uA
Minimum load current
Ilmin2
-
10
-
-
mA
Temperature stability
Temp2
-
-
0.5
-
%
On voltage
Von
Vout=Enabled
-
-
0.8
V
Off voltage
Voff
Vout=Disabled
2.0
-
-
V
ON/OFF CONTROL PART
( Vin= 5V, Co=10uF, Ta = 25
O
C, unless otherwise specified.)
* Note : Don't exceed following current limit.
( Iout1 : 500 mA, Iout2 : 500 mA )
December. 2002
(Rev.0)
- 5 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
APPLICATION SUMMARY
- ON / OFF
When you want to control output of the IP1525, use pin #2 as follows
As shown in figure
Pin#2 is positive input of the comparator,
and the other Input is threshold voltage.
If the voltage of the pin#2 rises above threshold voltage,
then TR Q1 will be saturated and the main bias current
will be shut down.
Pin#2
Vth
Main
bias
Q1
December. 2002
(Rev.0)
- 6 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
TYPICAL APPLICATION CIRCUIT
Vinput
N/C
VIN ON/OFF
VOUT1
PGND
ADJ1
VOUT2
PGND
ADJ2
1
2
6
4
5
3
7
IP1525
Vout1
Vout2
10uF
10uF
ON/OFF
Radj1
Radj2
Radj3
Radj4
*CALCULATION OF OUTPUT VOLTAGE
VOUT1 = VREF ( 1 + (Radj1 / Radj2) ) =1.25V ( 1 + (Radj1 / Radj2) )
VOUT2 = VREF ( 1 + (Radj3 / Radj4) ) =1.25V ( 1 + (Radj3 / Radj4) )
December. 2002
(Rev.0)
- 7 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
Pin no
Pin name
Internal circuit
2
ON/OFF
4,5,6,7
Regulator
Output1,2
Regulator
Adjustable
pin
INTERNAL CIRCUIT
2
5
7
4
6
Vref
December. 2002
(Rev.0)
- 8 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
ELECTRICAL CHARACTERISTICS CURVES
0
2
4
6
8
10
0
2
4
6
8
10
Vo1=Vo2=1.25V
Ro1=Ro2=1K
QUIESCENT CURRENT
Icc (mA)
Vcc (V)
-50
0
50
100
150
1.230
1.235
1.240
1.245
1.250
1.255
1.260
1.265
1.270
VREF TEMPERTURE STABILITY
VREF (V)
TEMP (
O
C)
December. 2002
(Rev.0)
- 9 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
ELECTRICAL CHARACTERISTICS CURVES (Continued)
0
200
400
600
800
1000
1.10
1.15
1.20
1.25
1.30
1.35
Vo1=1.25V,Vo2=1.25V
VOUT1,2 Load Regulation (Tj=25
o
C)
Output Voltage (V)
Output Current (mA)
0
20
40
60
80
-200
-100
0
100
200
Vout1=Vout2=1.25V
Io=50mA
Io=400mA
VOUT1,2 Load Transient Response
Output Voltage Deviation (mV)
Time (usec)
December. 2002
(Rev.0)
- 10 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
ELECTRICAL CHARACTERISTICS CURVES (Continued)
0
200
400
600
800
0.6
0.8
1.0
1.2
1.4
Dropout Voltage
Dropout Voltage (V)
Output Current (mA)
December. 2002
(Rev.0)
- 11 -
IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
www.interpionsemi.com
PACKAGE DIMENSION
14SOPH-8L
#1
6.00
0.30
(0.236
0.012)
3.95
0.2
(0.156
0.008)
5.72
(0.225)
0.60
0.20
(0.024
0.008)
0.20
+0.10
-0.05
(0.008,+0.004,-0.002)
0~8
0.47
(0.019)
0.406
+0.10
-0.05
(0.008,+0.004,-0.002)
1.27TYP
(0.050TYP)
1.80MAX
(0.071MAX)
MIN0.05
(MIN0.002)
1.55
0.10
(0.061
0.004)
2.946
4.216
8.56
0.20
(
0.347
0.008
)
8.70MAX
(0.343MAX)
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