HT7991 datasheet(4/13 Pages) HOLTEK

4 / 13 page

Rev. 1.20

June 01, 2017

HT7991

Electrical Characteristics

(VIN=3.3V and TA=+25°C, unless otherwise specified)

Symbol

Parameter

Test Condition

Min

Typ

Max

Unit

Supply Voltage

VIN

Input Voltage Range

—

2.6

—

5.5

Quiescent Current – Non-switching

VFB=0.66V

—

210

—

μA

IIN

Supply Current – Switching

VFB=0.55V

—

1.5

—

ISHDN

Shutdown Current

VIN=2.4V, VEN=0V

—

0.1

μA

Boost Converter

VOUT

Output Voltage Range

—

fSW

Switching Frequency

VFB=0.5V

0.8

1.0

1.2

MHz

Switching Frequency Variation

VIN=2.6V to 5.5V

—

DMAX

Maximum Duty Cycle

—

RDS

Internal Power MOSFET Drain Source

Resistance – RDS(ON)

ILX=2A

—

0.2

—

ISWL

Driver Leakage Current

VEN=0V, VLX=12V

—

0.1

μA

VFB

Feedback Voltage

—

0.588

0.6

0.612

Output Voltage Line Regulation

VIN=2.6V to 5.5V

—

0.2

—

%/V

VEN

EN High Voltage Threshold

—

1.2

—

VEN

EN Low Voltage Threshold

—

0.4

Protections

VUVLO

Input Supply Turn On Voltage Level

UVLO+

—

2.2

—

UVLO Hysteresis

—

100

—

IOCP

Over Current Protection Threshold

OC is floating (default)

—

2.5

—

VOVP

Output Over Voltage Threshold

OVP

—

tOTP

Thermal Shutdown Threshold

OTP

—

150

—

°C

Thermal Recovery Temperature

—

125

—

°C

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