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Fairchild Semiconductor Electronic Components Datasheet

KA7632 Datasheet

Fixed Multi-output Regulator

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KA7632/KA7633
Fixed Multi-output Regulator
www.fairchildsemi.com
Features
• Output Currents up to 0.5A (output1 & 2)
• Output Current up to 1A with External Transistor
(output3)
• Fixed Precision Output 1 voltage 3.3V ± 2%
• Fixed Precision Output 2 voltage 8V ± 2% (KA7632)
• Fixed Precision Output 2 voltage 9V ± 2% (KA7633)
• Control Signal Generator for Output 3 voltage (5.1V ± 2%)
• Reset Facility for Output Voltage1
• Output 2,3 with Disable by TTL Input
• Current Limit Protection at Each Output
• Thermal Shut Down
Description
The KA7632/KA7633 is a multi-output positive voltage
regulator designed to provide fixed precision output voltages
of 3.3V, 8V (KA7632) / 9V (KA7633) at current up to 0.5A
and 5.1V at current up to 1A with external PNP transistor.
An internal reset circuit generates a reset pulse when the
output 1 decrease below the regulated value. Output2 & 3
can be disabled by TTL input. Protection features include
over voltage protection, short circuit protection and thermal
shutdown.
10-SIP H/S
Internal Block Diagram
DEL.CAP
3
Cd
100nF
6
RESET
Vsys
10K
A614 "Y"
7
Control
10
Output 3
Vin1
1
10uA
-
+
SW
Bandgap
Reference
-
+
50mV
Vin2
2
2.5V
OVP
+
-
SCP
Vin1
9 Output 1
Thermal
Shut Down
OVP Vin2
-
+
SCP
+
-
Output 2,3
+
-
SCP
1.4V
8 Output 2
5
GND
4
Disable
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.1


Fairchild Semiconductor Electronic Components Datasheet

KA7632 Datasheet

Fixed Multi-output Regulator

No Preview Available !

KA7632/KA7633
Absolute Maximum Ratings
Parameter
DC Input Voltage
Disable Input Voltage
Output Current
Power Dissipation
Junction Temperature
Operating Temperature
Symbol
Vin
Vc
Io
Pd
Tj
Topr
Value
20
20
0.5
1.5
+150
0~+125
Unit
V
V
A
W
°C
°C
Remark
-
-
-
No Heatsink
-
-
Electrical Characteristics(KA7632)
(Refer to test circuit Vin1=6V ,Vin2=10.5V ,Tj = +25 °C, unless otherwise specified)
Parameter
Output Voltage 1
Symbol
Vo1
Output Voltage 2
Dropout Output Voltage 1,2
Line Regulation 1,2
Vo2
Vd1,2
Vo 1,2
Load Regulation 1,2
Vo 1,2
Output Voltage 3
Line Regulation 3
Load Regulation 3
Reset Pulse Delay
Saturation Voltage in Reset
Condition
Leakage Current at Pin 6
Output Voltage Thermal Drift
Short Circuit Output Current
Disable Voltage High
Disable Voltage Low
Disable Bias Current
Junction Temperature for TSD
Quiescent Current
Reset Threshold Voltage
Reset Threshold Hysteresis
Vo3
Vo3
Vo3
Trd
VrL
IrH
STt
Isc1,2
VdisH
VdisL
Idis
Ttsd
Iq
Vr
Vrth
Conditions
Io1=10mA
6V<Vin1<14V
5mA<Io1<500mA
Io2=10mA
10.5V<Vin2<18V
5mA<Io2<500mA
Io1,2=500mA
6V <Vin1<14V
10.5V <Vin2<18V
Io1,2 = 200mA
5mA < Io1< 500mA
5mA <Io2< 500mA
Vsys=7V, Io3=100mA
13V< Vin2 <18V, Io3 =100mA
5mA < Io3 < 1A
Cd=100nF, Note1
I6=5mA
V6=10V
0 °C <Tj < +125 °C , Note 2
Vin1=6V ,Vin2 =10.5V
Output 2 Active
Output 2 Disabled
0V < Vdis < 7V
Note 2
Io1=10mA, Output2 Disabled
K=Vo1
Note 1
Min. Typ. Max. Unit
3.22 3.3 3.38
3.14 3.3 3.46
V
7.84
7.7
8
8
8.16
8.3
V
- - 2.5 V
-
-
40
80
mV
-
-
70
160
mV
4.97 5.1 5.23
V
- - 50 mV
- - 110 mV
- 25 - ms
- - 0.4 V
-
-
-
2
-
-100
-
-
K-0.4
20
-
100
-
-
-
-
145
-
K-0.25
50
10
-
1.6
0.8
2
-
2
K-0.1
100
µA
ppm/°C
A
V
V
µA
°C
mA
V
mA
Notes:
1. To check the reset circuit ,the reset output is low to discharge the delay capacitor(=Cd). if it’s less than Vo1-0.25V. And the
reset output is high when the delay capacitor voltage linearly increased by the interal current source(10µA) if it’s more than
Vo1- 0.2V. The equations of delay time is same as below. Trd = (Cd × 2.5) / 10µA
2. These parameters, although guaranteed, are not 100% tested in production.
2


Part Number KA7632
Description Fixed Multi-output Regulator
Maker Fairchild
Total Page 8 Pages
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