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Intersil Electronic Components Datasheet

CA1523 Datasheet

Voltage Regulator Control Circuit

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November 2000
Features
®
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Voltage Regulator Control Circuit
for Variable Switching Regulator
Description
• Operates up to 200kHz
• Pins ESD Protected
• Remote ON/OFF
• Slow Start with Reset
• Overcurrent Sensing
• Lower Peak Currents than PWM Regulator
- Less Prone to Magnetic Saturation
Part Number Information
PART
NUMBER
CA1523E
TEMPERATURE
RANGE
0oC to +70oC
PACKAGE
14 Lead Plastic DIP
The CA1523 monolithic silicon integrated circuit is a variable
interval pulse regulator designed to provide the control cir-
cuitry for use in switching regulator circuits. It operates from
11V to 15V.
The regulator provides a single output drive capable of
300mA source/200mA sink. The maximum operating fre-
quency is better than 200kHz. An attractive feature of the
CA1523 is that the timing capacitor charge and discharge
current is set up externally via a single resistor. The ratio of
charge to discharge current is internally set at a maximum of
2 to 1 allowing simultaneous change in output pulse width
with increased frequency at higher load. The pulse width
variation at higher frequencies effectively compensates for
the losses in magnetics and thereby increases the power
supply efficiency at higher load end by as much as 20
percent.
Pinout
CA1523 (PDIP)
TOP VIEW
ERROR 1
CURRENT SENSE 2
GND 3
RISE TIME 4
OUTPUT GND 5
OUTPUT 6
VCC 7
14 TIMING
13 ZENER
12 ON/OFF
11 OVER CURRENT
10 SLOW START
9 LOGIC OUTPUT
8 NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
1
File Number 1785.3


Intersil Electronic Components Datasheet

CA1523 Datasheet

Voltage Regulator Control Circuit

No Preview Available !

Specifications CA1523
Absolute Maximum Ratings
Thermal Information
DC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Supply Current
|6(MAX). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50mA
|6(MAX), 1µs,1800pF Load . . . . . . . . . . . . . . . . . . . . +300, -200mA
Device Dissipation
Up to TA = 70oC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 530mW
Above TA = 70oC . . . . . . . . . . . . . . Derate Linearly at 6.7mW/oC
Thermal Resistance
Plastic DIP Package . . . . . . . . . . . . . . . . . . . . . . . .
θJA
120oC/W
Device Dissipation
Up to TA = 70oC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665mW
Ambient Temperature Range
Operating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to +70oC
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +150oC
Lead Temperature (During Soldering)
At distance 1/16 ± in. (1.59mm ±0.79mm)
from case for 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . +265oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Electrical Specifications TA = +25oC, Refer to condition shown in test circuit; V7 = 13V, V1 = 5.9V Unless Otherwise Specified
PARAMETERS
PIN
TEST CONDITIONS
MIN TYP MAX UNITS
POWER SUPPLY, VCC (PIN 7)
Supply Voltage
7
9.5 13
-
V
Supply Current
Zener Voltage
7 VCC = +13V
13
20 27 34 mA
7.8 8.4 8.9
V
OUTPUT PULSE (PIN 6)
Maximum Pulse Width
6 Measured at 6V Threshold Level
5.5 6.5 7.5 µs
Minimum Pulse Width
6 Measured at 6V Threshold Level
2 3 4 µs
Output High Voltage
Output Low Voltage
Rise Time
6 |6 = 0mA, V4 = 0V
6 |6 = 50mA, V12 = 0V
6 Measured at 1.8V and 10V Threshold Levels
11.1 12 12.6
0.6 1 1.3
250 600 1250
V
V
ns
Fall Time
6 Measured at 1.8V and 10V Threshold Levels
50 200 350 ns
ERROR VOLTAGE RANGE (PIN 1)
Error Voltage Reference
1 Adjust RT; Observe Pin 6 Min/Max
Frequency Range
5.9 6.8 7.5
V
CHARGE CURRENT (PIN 14)
Charge Current
Discharge Current
Slow Start Discharge Current
14 Adjust RT, V1 = 7.5V; Set V14 = 0V, Then V14 = 2.5V 190 220 250
µA
14 Adjust RT = 5.9V; Set V14 = 5.5V, Then 5V
95 110 125 µA
14 Maintain V14 = 5V, V10 = 5.5V
Set V10 = 5.5V, Measure I14 (Hi)
Set V10 = 4V, Measure I14 (Lo)
Limits = I14 (Hi) - I14 (Lo)
1.5
20 30 40 µA/V
LOGIC TESTS
Discharge Voltage
10 Pin 12 = 1kto GND
1.7 2.4 3.2
V
Output Inhibit Voltage
Overcurrent Trip Voltage
7 Increase V7 Until V9 2V
11 V12 = 5V; V10 = 0V; Increase V11 Until V9 0.5V
7.9 8.4 9.1
1.1 1.25 1.4
V
V
2


Part Number CA1523
Description Voltage Regulator Control Circuit
Maker Intersil Corporation
Total Page 6 Pages
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