NCP81045MNTXG datasheet(8/17 Pages) ONSEMI

Part #	NCP81045MNTXG

Description	Single Synchronous Step-Down Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP81045

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ELECTRICAL CHARACTERISTICS (VIN = 12 V, VCC = VCCP = 5 V, TA =−40°C to 85°C, unless other noted)

Characteristics

Unit

Max

Typ

Min

Test Conditions

Symbol

OVERCURRENT PROTECTION SETTING

Adjustable OC Threshold

V_OCTH

((CS+)−(CS−))

(CS+) – (CS−),

During OC threshold, set a voltage at

pin OCP

15

20

25

mV

52

60

68

GATE DRIVERS

DH Pull−HIGH Resistance

RH_DH

200 mA Source current

1

W

DH Pull−LOW Resistance

RL_DH

200 mA Sink current

1

W

DL Pull−HIGH Resistance

RH_DL

200 mA Source current

1

W

DL Pull−LOW Resistance

RL_DL

200 mA Sink current

0.5

W

DH Source Current

Isource_DH

(Note 2)

2.5

A

DH Sink Current

Isink_DH

(Note 2)

2.5

A

DL Source Current

Isource_DL

(Note 2)

2.5

A

DL Sink Current

Isink_DL

(Note 2)

5

A

Dead Time

TD_LH

DL−off to DH−on (Note 2)

20

ns

TD_HL

DH−off to DL−on (Note 2)

20

ns

Negative Current Detection Threshold

NCD_TH

SWN − PGND, at EN = 5 V

−1

mV

SWN source leakage

ISWN_SD

EN = 0 V, SWN = 0 V

1

mA

Internal Resistor from DH to SWN

R_DH_SWN

(Note 2)

100

kW

CONTROL SECTION

EN Logic Input Voltage for Disable

VEN_Disable

Set as Disable

0.7

1.0

1.3

V

Hysteresis

150

200

250

mV

EN Logic Input Voltage for MASTER

Mode

VEN_Master

Set as Master Mode

1.7

1.95

2.25

V

EN Logic Input Voltage for SLAVE

Mode

VEN_Slave

Set as Slave Mode

2.4

2.65

2.9

V

Hysteresis

100

175

250

mV

EN Source Current

IEN_SOURCE

VEN = 0 V

0.1

mA

EN Sink Current

IEN_SINK

VEN = 5 V

0.1

mA

PGOOD Pin ON Resistance

PGOOD_R

I_PGOOD = 5 mA

100

W

PGOOD Pin OFF Current

PGOOD_LK

1

mA

SYNC CONTROL

SYNC pin leakage

ISYNC_LK

Set as Slave Mode, SYNC = 5 V

1

uA

SYNC frequency

F_SYNC

(Note 2)

1.2

MHz

Pulse Width

PW_SYNC

(Note 2)

416

ns

Clock Level Low

V_CLKL

(Note 2)

0

V

Clock Level High

V_CLKH

(Note 2)

5

V

SYNC Driving Capability

SYNC_CL

Set as Master Mode, load capacitor

between SYNC and GND (Note 2)

20

pF

SYNC Source Current

ISYNC

SYNC shorts to ground

20

mApp

OUTPUT DISCHARGE MODE

Output Discharge On−Resistance

Rdischarge

EN = 0 V

20

35

W

Threshold for Discharge Off

Vth_DisOff

0.2

0.3

0.4

V

2. Guaranteed by design, not tested in production.

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