ADP1850 datasheet(4/32 Pages) AD

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ADP1850

Rev. 0 | Page 4 of 32

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

GATE DRIVERS

DHx Rise Time

CDH = 3 nF, VBST − VSW = 5 V

DHx Fall Time

CDH = 3 nF, VBST − VSW = 5 V

DLx Rise Time

CDL = 3 nF

DLx Fall Time

CDL = 3 nF

DHx to DLx Dead Time

External 3 nF is connected to DHx and DLx

DHx or DLx Driver RON, Sourcing

Current1

RON_SOURCE

Sourcing 2 A with a 100 ns pulse

Sourcing 1 A with a 100 ns pulse, VIN = 3 V

2.3

DHx or DLx Driver RON, Tempco

TCRON

VIN = 3 V or 12 V

0.3

%/oC

DHx or DLx Driver RON, Sinking

Current1

RON_SINK

Sinking 2 A with a 100 ns pulse

1.5

Sinking 1 A with a 100 ns pulse, VIN = 3 V

DHx Maximum Duty Cycle

fSW = 300 kHz

DHx Maximum Duty Cycle

fSW = 1500 kHz

Minimum DHx On Time

fSW = 200 kHz to 1500 kHz

135

Minimum DHx Off Time

fSW = 200 kHz to 1500 kHz

335

Minimum DLx On Time

fSW = 200 kHz to 1500 kHz

285

COMPx VOLTAGE RANGE

COMPx Pulse Skip Threshold

VCOMP,THRES

In pulse skip mode

0.9

COMPx Clamp High Voltage

VCOMP,HIGH

2.25

THERMAL SHUTDOWN

Thermal Shutdown Threshold

TTMSD

155

C

Thermal Shutdown Hysteresis

C

OVERVOLTAGE AND POWER GOOD

THRESHOLDS

FBx Overvoltage Threshold

VOV

VFB rising

0.635

0.65

0.665

FBx Overvoltage Hysteresis

FBx Undervoltage Threshold

VUV

VFB falling

0.525

0.55

0.578

FBx Undervoltage Hysteresis

TRKx INPUT VOLTAGE RANGE

FBx TO TRKx OFFSET VOLTAGE

TRKx = 0.1 V to 0.57 V, offset = VFB − VTRK

−10

+10

SOFT START

SSx Output Current

ISS

During start-up

4.6

6.5

8.4

μA

SSx Pull-Down Resistor

During a fault condition

kΩ

FBx to SSx Offset

VSS = 0.1 V to 0.6 V, offset = VFB − VSS

−10

+10

PGOODx

PGOODx Pull-up Resistor

RPGOOD

Internal pull-up resistor to VCCO

12.5

kΩ

PGOODx Delay

μs

Over Voltage or Under Voltage

This is the minimum duration required to trip

the PGOOD signal

μs

Minimum Duration

ILIM1, ILIM2 Threshold Voltage1

Relative to PGNDx

−5

ILIM1, ILIM2 Output Current

ILIMx = PGNDx

μA

Current Sense Blanking Period

After DLx goes high, current limit is not sensed

during this period

100

INTEGRATED RECTIFIER

(BOOST DIODE) RESISTANCE

At 20 mA forward current

ZERO CURRENT CROSS OFFSET

(SWx TO PGNDx)1

In pulse skip mode only, fSW = 600 kHz

1 Guaranteed by design.

2 Connect VIN to VCCO when 2.75 V < VIN < 5.5 V.

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