3.2

Electrical characteristics

Table 5. Electrical characteristics (VCC = 12 V; TA = - 40 °C to 125 °C, unless otherwise specified.)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Recommended operating conditions

VCC

Device supply voltage

See Figure 1

4.1

13.2

V

VIN

Conversion input voltage

13.2

V

VCC< 7.0 V

19.0

V

Supply current and power-on

ICC

VCC supply current

UGATE and LGATE = open

6

mA

IBOOT

BOOT supply current

UGATE = open; PHASE to GND

0.5

mA

UVLO

VCC turn-on

VCC rising

4.1

V

Hysteresis

0.2

V

Oscillator

FSW

Main oscillator accuracy

TA = 25 °C

270

300

330

kHz

250

300

350

kHz

DVOSC

PWM ramp amplitude

1.5

V

dMAX

Maximum duty cycle

80

%

Reference

Output voltage accuracy

VOUT = 0.8 V, TA = 25 °C

-1

-

1

%

VOUT = 0.8 V

-1.5

1.5

%

Error amplifier

A0

DC gain (1)

120

dB

GBWP

Gain-bandwidth product (1)

15

MHz

SR

Slew rate (1)

8

V/μs

IFB

Input bias current

Sourced from FB

100

nA

DIS

Disable threshold

COMP falling

0.43

0.5

V

Gate drivers

IUGATE

HS source current

BOOT- PHASE = 5 V to 12 V

1.5

A

RUGATE

HS sink resistance

BOOT- PHASE = 5 V to 12 V

1.1

Ω

ILGATE

LS source current

VCC = 5 V to 12 V

1.5

A

RLGATE

LS sink resistance

VCC = 5 V to 12 V

0.65

Ω

Overcurrent protection

IOCSET

OCSET current source TA = 25 °C

Sunk from COMP pin, before SS

55

60

65

μA

OCSET current source

52

60

68

VCC_OC

OC switch-over threshold

VCC rising

8

V

VOC_TH

Fixed OC threshold

VPHASE to GND, VCC > VCC_OC

-400

mV

Overand undervoltage protections

OVP

OVP threshold

FB rising

1

V

UVP

UVP threshold

FB falling

0.6

V

1. Guaranteed by design, not to be tested

A6727B

Electrical characteristics

DS14159 - Rev 2

page 5/26