CS5112 datasheet(3/13 Pages) ONSEMI

Part #	CS5112

Description	1.4 A Switching Regulator with 5.0 V, 100 mA Linear Regulator with Watchdog, RESET and ENABLE

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Manufacturer	ONSEMI [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

Test Conditions

Min

Typ

Max

Unit

General

IIN Off Current

6.6 V

≤ VIN ≤ 26 V, ISW = 0 A

−

2.0

mA

IIN On Current

6.6 V

≤ VIN ≤ 26 V, ISW = 1.4 A

−

30

70

mA

IREG Current

ILIN = 100 mA, 6.6 V ≤ VIN ≤ 26 V

−

6.0

mA

Thermal Limit

Guaranteed by Design

160

−

210

°C

5.0 V Regulator Section

VLIN Output Voltage

6.6 V

≤ VREG ≤ 26 V, 1.0 mA ≤ ILIN ≤ 100 mA

4.9

5.0

5.1

V

Dropout Voltage

(VREG − VLIN) @ ILIN = 100 mA

−

1.2

1.5

V

Line Regulation

6.6 V

≤ VREG ≤ 26 V, ILIN = 5.0 mA

−

5.0

25

mV

Load Regulation

VREG = 19 V, 1.0 mA ≤ ILIN ≤ 100 mA

−

5.0

25

mV

Current Limit

6.6 V

≤ VREG ≤ 26 V

120

−

mA

DC Ripple Rejection

14 V

≤ VREG ≤ 24 V

60

75

−

dB

RESET Section

Low Threshold (VRTL)

VLIN Decreasing

4.05

4.25

4.45

V

High Threshold (VRTH)

VLIN Increasing

4.2

4.45

4.7

V

Hysteresis

VRTH − VRTL

140

190

240

mV

Active High

VLIN > VRTH, IRESET = −25 mA

VLIN − 0.5

−

V

Active Low

VLIN = 1.0 V, 10 kW Pullup from RESET to VLIN

VLIN = 4.0 V, IRESET = 1.0 mA

−

0.4

0.7

V

Delay

Invalid WDI

6.25

8.78

11

ms

Power On Delay

VLIN Crossing VRTH

6.25

−

ms

Watchdog Input (WDI)

VIH

Peak WDI Needed to Activate RESET

−

2.0

V

VIL

−

0.8

−

V

Hysteresis

(Note 2)

25

50

−

mV

Pullup Resistor

WDI = 0 V

20

50

100

k

W

Low Threshold

−

6.25

8.78

11

ms

Floating Input Voltage

−

3.5

−

V

WDI Pulse Width

−

5.0

ms

Switcher Section

Minimum Operating Input Voltage

−

5.0

V

Switching Frequency

Refer to Figure 5

80

95

110

kHz

Switch Saturation Voltage

ISW = 1.4 A

0.7

1.1

1.6

V

Output Current Limit

−

1.4

−

2.5

A

Max Switching Frequency

VSW = 7.5 V with 50 W Load, Refer to Figure 5

120

−

kHz

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

mA

Oscillator Charge Current

COSC = 0 V

35

40

45

mA

Oscillator Discharge Current

COSC = V40

270

320

370

mA

CDelay Charge Current

CDelay = 0 V

35

40

45

mA

2. Guaranteed by design, not 100% tested in productions.

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