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CS5111YDWF24 Datasheet(PDF) 4 Page - ON Semiconductor

Part # CS5111YDWF24
Description  Switching Regulator
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS5111YDWF24 Datasheet(HTML) 4 Page - ON Semiconductor

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ELECTRICAL CHARACTERISTICS (continued) (5.0 V
≤ VIN ≤ 26 V and –40°C ≤ TJ ≤ 150°C, COUT = 100 µF (ESR ≤ 8.0 Ω),
CDelay = 0.1 µF, RBIAS = 64.9 kΩ, COSC = 390 pF, CCOMP = 0.1 µF; unless otherwise specified.)
Characteristic
Unit
Max
Typ
Min
Test Conditions
Switcher Section (continued)
VFB1 Regulation Voltage
1.206
1.25
1.294
V
VFB2 Regulation Voltage
1.206
1.25
1.294
V
VFB1, VFB2 Input Current
VFB1 = VFB2 = 5.0 V
1.0
µA
Oscillator Charge Current
COSC = 0 V
35
40
45
µA
Oscillator Discharge Current
COSC = V40
270
320
370
µA
CDelay Charge Current
CDelay = 0 V
35
40
45
µA
Switcher Max Duty Cycle
VSW = 5.0 V with 50 Ω Load,
VFB1 = VFB2 = 1.0 V
72
85
95
%
Current Sense Amp Gain
ISW = 2.3 A
7.0
V/V
Error Amp DC Gain
67
dB
Error Amp Transconductance
2700
µA/V
ENABLE Input
VIL
0.8
1.24
V
VIH
1.3
2.0
V
Hysteresis
60
mV
Input Impedance
10
20
40
k
Select Input
VIL (Selects VFB1)
4.9
≤ VLIN ≤ 5.1
0.8
1.25
V
VIH (Selects VFB2)
4.9
≤ VLIN ≤ 5.1
1.25
2.0
V
SELECT Pull–Up
SELECT = 0 V
10
24
50
k
Floating Input Voltage
3.5
4.5
V
PIN FUNCTION DESCRIPTION
PACKAGE PIN #
SO–24L
PIN SYMBOL
FUNCTION
1
VIN
Supply voltage.
2, 3
NC
No connection.
4
VSW
Collector of NPN power switch for switching regulator section.
5, 6, 7, 8, 17, 18, 19, 20
GND
Connected to the heat removing leads.
9
VFB1
Feedback input voltage 1 (referenced to 1.25 V).
10
VFB2
Feedback input voltage 2 (referenced to 1.25 V).
11
SELECT
Logic level input that selects either VFB1 or VFB2. An open selects VFB2. Connect
to GND to select VFB1.
12
COMP
Output of the transconductance error amplifier.
13
COSC
A capacitor connected to GND sets the switching frequency. Refer to Figure 5.
14
WDI
Watchdog input. Active on falling edge.
15
CDelay
A capacitor connected to GND sets the Power On Reset and Watchdog time.
16
RESET
RESET output. Active low if VLIN is below the regulation limit. If watchdog timeout
is reached, a reset pulse train is issued.


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