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KA7632/KA7633
Fixed Multi-output Regulator
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
Vin1
1
10uA
3
Cd
100nF
RESET
Vsys
6
-
+
SW
Thermal
Shut Down
Bandgap
Reference
Vin2
2
OVP
Vin1
2.5V
DEL.CAP
+
-
SCP
9 Output 1
-
+
50mV
OVP
Vin2
10K
A614 "Y"
Control
10
Output3
7
-
+
SCP
+
-
+
-
Output 2,3
1.4V
SCP
8 Output 2
5
GND
4
Disable
Rev. 1.0.1
©2001 Fairchild Semiconductor Corporation
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
