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CS5112 датащи(PDF) 4 Page - ON Semiconductor

номер детали CS5112
подробное описание детали  1.4 A Switching Regulator with 5.0 V, 100 mA Linear Regulator with Watchdog, RESET and ENABLE
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производитель  ONSEMI [ON Semiconductor]
домашняя страница  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS5112 датащи(HTML) 4 Page - ON Semiconductor

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CS5112
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ELECTRICAL CHARACTERISTICS (5.0 V
≤ VIN ≤ 26 V and −40°C ≤ TJ ≤ 150°C, COUT = 100 mF (ESR ≤ 8.0 W), CDelay = 0.1 mF,
RBIAS = 64.9 kW, COSC = 390 pF, CCOMP = 0.1 mF; unless otherwise specified.)
Characteristic
Unit
Max
Typ
Min
Test Conditions
Switcher Section (continued)
Switcher Max Duty Cycle
VSW = 5.0 V with 50 W 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
mA/V
ENABLE Input
VIL
0.8
1.24
V
VIH
1.3
2.0
V
Hysteresis
60
mV
Input Impedance
10
20
40
k
W
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 Pullup
SELECT = 0 V
10
24
50
k
W
Floating Input Voltage
3.5
4.5
V
PIN FUNCTION DESCRIPTION
PACKAGE PIN #
SOIC−24
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.
21
IBIAS
A resistor connected to GND sets internal bias currents as well as the COSC and CDelay
charge currents.
22
VLIN
Regulated 5.0 V output from the linear regulator section.
23
VREG
Input voltage to the linear regulator and the internal supply circuitry.
24
ENABLE
Logic level input to shut down the switching regulator.


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