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