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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
DESCRIPTION
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.
14SOPH-8L
FEATURES
- 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
ORDERING INFORMATION
Device SAC1525 Package 14SOPH-8L Operating Temp -35 OC ~ +85 OC
BLOCK DIAGRAM
VIN
1
OCL OVP
ON/OFF
2
On/off control SW
Shutdown
TSD
PGND
N/C
3
Vref
ADJ1
4
VOUT1
5
VOUT2
6
PGND
ADJ2
7
December. 2002 (Rev.0)
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
PIN CONNECTIONS
PGND
PGND
IP1525
1 2 3 4 5 6 7
VIN
ON/OFF
N/C
ADJ1 VOUT1 VOUT2 ADJ2
PIN DESCRIPTIONS
NO 1 2 3 4 5 6 7 8 SYMBOL VIN ON/OFF N/C ADJ1 VOUT1 VOUT2 ADJ2 PGND I/O I I I O O I DESCRIPTION Input Supply Voltage ON/OFF control No Connection Regulator 1 Adjustable Pin Regulator 1 Output (Adjustable) Regulator 2 Output (Adjustable) Regulator 2 Adjustable Pin Power Ground
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
ABSOLUTE MAXIMUM RATINGS(TA=25OC)
CHARACTERISTICS Maximum supply voltage Input voltage Power dissipation Operating temperature Storage temperature SYMBOL Vccmax Vinmax Pd Topr Tstr VALUE 10 10 3.0* -35 ~ +85 -55 ~ +150 UNIT V V W
O
C C
O
Note> 1. When mounted on 100mm X 100mm X 1mm PCB (Phenolic resin material). 2. Power dissipation reduces 24mW/OC for using above Ta=25O C 3. Do not exceed Pd and SOA.
POWER DISSIPATION CURVE
4 Power Dissipation (W) 3 2 SOA 1
0
25
50
75
100
125
150
175
Ambient Temperature (C)
RECOMMENDED OPERATING CONDITIONS
CHARACTERISTICS Input voltage SYMBOL VIN VALUE 4.5 ~ 6.0 UNIT V
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
ELECTRICAL CHARACTERISTICS
( Vin= 5V, Co=10uF, Ta = 25O C, unless otherwise specified.) Characteristics Quiescent current OVP Dectecting Voltage Reference voltage Symbol Icc Vovp Vref Condition Vcc=5V, No-Load Vcc=Variable Min. 6.5 1.212 Typ. 7 1.25 Max. 12 1.288 Units mA V V
LDO REGULATOR 1 (ADJUSTABLE TYPE)
Output Voltage Line Regulation Load Regulation Dropout voltage Ripple rejection Current limit
*Note
Vout1 dVline1 dVload1 Vdrop1 RR1 Ilimit1 Iadj 1 Ilmin1 Temp1
Io=10mA Vin=4.5~6V, Io=10mA Ta=25 OC Vin=5V, 10mA < Io < 400mA Io=400mA F=120Hz, Co=10uF Tantalum Vin-Vout=2V, Io=200mA Vin-Vout=3.0V -
Vref 60 500 10 -
0.01 0.4 1.1 70 0.1 0.5
Vin1.5V 0.2 0.8 1.3 -
V % % V dB mA uA mA %
Adjust pin current Minimum load current Temperature stability
LDO REGULATOR 2 (ADJUSTABLE TYPE)
Output Voltage Line Regulation Load Regulation Dropout voltage Ripple rejection Current limit
*Note
Vout2 dVline2 dVload2 Vdrop2 RR2 Ilimit2 Iadj 2 Ilmin2 Temp2
Io=10mA Vin=4.5~6V, Io=10mA Ta=25 OC Vin=5V, 10mA < Io < 400mA Io=400mA F=120Hz, Co=10uF Tantalum Vin-Vout=2V, Io=200mA Vin-Vout=3.0V -
Vref 60 500 10 -
0.01 0.4 1.1 70 0.1 0.5
Vin1.5V 0.2 0.8 1.3 -
V % % V dB mA uA mA %
Adjust pin current Minimum load current Temperature stability
ON/OFF CONTROL PART
On voltage Off voltage Von Voff Vout=Enabled Vout=Disabled 2.0 0.8 V V
* Note : Don't exceed following current limit. ( Iout1 : 500 mA, Iout2 : 500 mA ) December. 2002 (Rev.0)
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
APPLICATION SUMMARY
- ON / OFF When you want to control output of the IP1525, use pin #2 as follows
Main bias
Q1 Pin#2
Vth
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.
December. 2002 (Rev.0)
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
TYPICAL APPLICATION CIRCUIT
PGND
PGND
IP1525
VIN 1 ON/OFF 2 N/C 3 ADJ1 VOUT1 VOUT2 ADJ2 4
Radj1
5
6
Radj3
7
Radj2
Radj4 10uF 10uF
Vinput
ON/OFF Vout1 Vout2
*CALCULATION OF OUTPUT VOLTAGE
VOUT1 = VREF ( 1 + (Radj1 / Radj2) ) =1.25V ( 1 + (Radj1 / Radj2) ) VOUT2 = VREF ( 1 + (Radj3 / Radj4) ) =1.25V ( 1 + (Radj3 / Radj4) )
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
INTERNAL CIRCUIT
Pin no Pin name Internal circuit
2
2
ON/OFF
4,5,6,7
Regulator Output1,2 Regulator Adjustable pin
Vref
4
7
5
6
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
ELECTRICAL CHARACTERISTICS CURVES
QUIESCENT CURRENT
10
8
Vo1=Vo2=1.25V Ro1=Ro2=1K
Icc (mA)
6
4
2
0 0 2 4 6 8 10
Vcc (V)
VREF TEMPERTURE STABILITY
1.270 1.265 1.260
VREF (V)
1.255 1.250 1.245 1.240 1.235 1.230 -50 0 50 100
O
150
TEMP ( C)
December. 2002 (Rev.0)
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
ELECTRICAL CHARACTERISTICS CURVES (Continued)
VOUT1,2 Load Regulation (Tj=25 C)
1.35
o
1.30
Output Voltage (V)
Vo1=1.25V,Vo2=1.25V
1.25
1.20
1.15
1.10 0 200 400 600 800 1000
Output Current (mA)
VOUT1,2 Load Transient Response
200
Output Voltage Deviation (mV)
Vout1=Vout2=1.25V
100
Io=50mA
0
Io=400mA
-100
-200 0 20 40 60 80
Time (usec)
December. 2002 (Rev.0)
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
ELECTRICAL CHARACTERISTICS CURVES (Continued)
Dropout Voltage
1.4
Dropout Voltage (V)
1.2
1.0
0.8
0.6 0 200 400 600 800
Output Current (mA)
December. 2002 (Rev.0)
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IP1525
DUAL OUTPUT VOLTAGE LDO REGULATOR
PACKAGE DIMENSION
14SOPH-8L
MIN0.05 1.55 0.10
(0.061 0.004)
(MIN0.002) (0.019)
#1
4.216
0.47 0.406 1.80MAX
(0.071MAX)
+0.10 -0.05
2.946
8.56 0.20 (0.347 0.008)
(0.343MAX)
8.70MAX
6.00 0.30
(0.236 0.012)
(0.008,+0.004,-0.002)
3.95 0.2
(0.156 0.008)
0.20 +0.10 -0.05
5.72 0.60 0.20
(0.024 0.008)
(0.225)
0~8
December. 2002 (Rev.0)
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1.27TYP
(0.050TYP)
- 11 -
(0.008,+0.004,-0.002)

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