CS52843
Electrical Characteristics: -40
≤
T
A
≤
85˚C; V
CC
= 15V (Note 1); R
T
= 680Ω; C
T
= .022µF for triangle mode,
R
T
= 10kΩ; C
T
= 3.3nF sawtooth mode unless otherwise stated.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Rise Time
Fall Time
Output Leakage
s
Total Standby Current
Start-Up Current
Operating Supply Current
V
CC
Zener Voltage
T
J
= 25˚C, C
L
= 1nF (Note 1)
T
J
=25˚C, C
L
=1nF (Note 1)
UVLO Active V
OUT
= 0
50
50
-.01
150
150
-10.0
ns
ns
µA
300
V
FB
=V
Sense
=0V R
T
=10kΩ, C
T
=3.3nF
I
CC
=25mA
11
34
500
17
µA
mA
V
s
Undervoltage Lockout Section
Start Threshold
Min. Operating Voltage
Notes:
7.8
After Turn On
7.0
8.4
7.6
9.0
8.2
V
V
1.These parameters, although guaranteed, are not 100% tested in production.
2. Parameter measured at trip point of latch with V
FB
=0.
3. Gain defined as: A =
∆V
COMP
∆V
Sense
; 0
≤
V
Sense
≤
0.8V.
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
8L
SO Narrow
1
2
3
4
5
5
6
7
7
8
14L
SO Narrow
1
3
5
7
8
9
10
11
12
14
2,4,6,13
COMP
V
FB
Sense
OSC
Gnd
Pwr Gnd
V
OUT
V
CC
Pwr
V
CC
V
REF
NC
Error amp output, used to compensate error amplifier.
Error amp inverting input.
Noninverting input to Current Sense Comparator.
Oscillator timing network with Capacitor to Ground, resistor to V
REF
.
Ground.
Output driver Ground.
Output drive pin.
Output driver positive supply.
Positive power supply.
Output of 5V internal reference.
No Connection.
3
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
