CS51313 Ver la hoja de datos (PDF) - ON Semiconductor
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CS51313
ON Semiconductor
CS51313 Datasheet PDF : 23 Pages
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CS51313
ELECTRICAL CHARACTERISTICS (continued) (0°C < TA < 70°C; 0°C < TJ < 125°C; 9.0 V < VCC < 14 V;
2.0 V DAC Code (VID4 = VID3 = VID2 = VID1 = 0, VID0 = 1.0) CGATE(H) = CGATE(L) = 3.3 nF, COFF = 390 pF; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Power Good Output
PWRGD Sink Current
PWRGD Upper Threshold
VFB = 1.7 V, VPWRGD = 1.0 V
% of Nominal DAC Code
0.5
4.0
15
mA
5.0
8.5
12
%
PWRGD Lower Threshold
% of Nominal DAC Code
−12
−8.5
−5.0
%
PWRGD Output Low Voltage
Overvoltage Protection (OVP) Output
VFB = 1.7 V, IPWRGD = 500 μA
−
0.2
0.3
V
OVP Source Current
OVP = 1.0 V
1.0
10
25
mA
OVP Threshold
% of Nominal DAC Code
5.0
8.5
12
%
OVP Pull−Up Voltage
General Electrical Specifications
IOVP = 1.0 mA, VCC − VOVP
−
1.1
1.5
V
VCC Monitor Start Threshold
VCC Monitor Stop Threshold
Hysteresis
−
−
Start−Stop
7.9
8.4
8.9
V
7.6
8.1
8.6
V
0.15
0.3
0.6
V
VCC Supply Current
No Load on GATE(H), GATE(L)
−
12
20
mA
PACKAGE PIN DESCRIPTION
PACKAGE PIN #
SO−16
1, 2, 3, 4, 6
PIN SYMBOL
VID0−VID4
5
VREF
7
VFB
8
VOUT
9
VCC
10
GATE(H)
11
GND
12
GATE(L)
13
OVP
14
PWRGD
15
COFF
16
COMP
FUNCTION
Voltage ID DAC inputs. These pins are internally pulled up to 5.65 V if left
open. VID4 selects the DAC range. When VID4 is high (logic one), the Error
Amp reference range is 2.125 V to 3.525 V with 100 mV increments. When
VID4 is low (logic zero), the Error Amp reference voltage is 1.325 V to 2.075 V
with 50 mV increments.
Bandgap Reference Voltage. It can be used to generate other regulated output
voltages.
Error amp inverting input, PWM comparator non−inverting input, current limit
comparator non−inverting input, PWRGD and OVP comparator input.
Current limit comparator inverting input.
Input power supply pin for the internal circuitry. Decouple with filter capacitor to
GND.
High side switch FET driver pin.
Ground pin.
Low side synchronous FET driver pin.
Overvoltage protection pin. Goes high when overvoltage condition is detected
on VFB.
Power Good Output. Open collector output drives low when VFB is out of regu-
lation.
Off−Time Capacitor pin. A capacitor from this pin to GND sets the off time for
the regulator.
Error amp output. PWM comparator inverting input. A capacitor to GND pro-
vides error amp compensation.
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