![](http://datasheet.mmic.net.cn/230000/IP1524J_datasheet_15586068/IP1524J_2.png)
LAB
SEME
IP1524 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 3/95
V
R
C
+5V TO ALL
INTERNAL CIRCUITRY
INV.
INPUT
N.I.
INPUT
GND
ERROR
AMP
REFERENCE
REGULATOR
OSCILLATOR
OSCILLATOR
OUTPUT
3
FLIP
FLOP
COMPARATOR
+5V
NOR
NOR
SHUTDOWN
C
E
C
E
+5V
C.L.
(SUBSTRATE)
COMPENSATION
+SENSE
–SENSE
+5V
4
9
5
1
2
8
10
IN
T
T
15
6
7
A
A
B
B
12
11
13
14
16
1k
10k
+8 to +40V
0 to +40V
+1.8 to +3.4V
0 to 100mA
0 to 20mA
30
μ
A to 2mA
50Hz to 500kHz
1.8k
to 100k
1nF to 0.1
μ
F
–55 to +125°C
-25 to +85°C
0 to +70°C
RECOMMENDED OPERATING CONDITIONS
V
IN
Input Voltage
Collector Voltage
Error Amp Common Mode Range
Output Current
Reference Load Current
Oscillator Charging Current
Oscillator Frequency Range
R
T
Oscillator Timing Resistor
C
T
Oscillator Timing Capacitor
T
AMB
Operating Ambient Temperature Range
DESCRIPTION
The IP1524 series of PWM switching regulator control circuits contains all the functions required to implement single-
ended or push-pull switching regulators. Included are voltage reference, error amplifer, oscillator, PWM comparator,
output drivers, current limiting and shutdown circuitry.
Although functionally indentical to the SG1524 series, SEMELAB has incorporated several improvements to the IP1524
allowing tighter and more complete specification of electrical performance.
BLOCK DIAGRAM
(each transistor)
IP1524
IP2524
IP3524