R2A20133DSP

Preliminary

R03DS0052EJ0401 Rev.4.01

Page 5 of 13

Jan 08, 2016

Electrical Characteristics

(Ta = 25°C, VCC = 12 V, CS = 0.04 V, FB = 2 V, COMP: Open, OVP2 = 1 V, RRT = 200 k

Ω)

Item

Symbol

Min

Typ

Max

Unit

Test Conditions

Supply

UVLO turn-on threshold

Vuvlh

8.8

9.5

10.2

V

UVLO turn-off threshold

Vuvll

8.1

8.5

8.9

V

UVLO hysteresis

Hysuvl

0.6

1.0

1.4

V

Standby current

Istby

—

100

200

μA

VCC = Vuvlh – 0.2 V

Operating current

Icc

—

1.8

2.6

mA

Error

amplifier

Feedback voltage

Vfb

2.472

2.510

2.548

V

FB-COMP short

Temperature stability

dVfb

—

±80

—

ppm/°C

Input bias current

Ifb

–0.40

–0.15

–0.05

μA

Measured pin: FB

Open loop gain

Av

—

65

—

dB

*

1

Upper clamp voltage

Vclamp-comp

3.75

4.10

4.35

V

FB = 2.45 V

COMP: Open

Low voltage

Vl-comp

—

0.1

0.3

V

FB = 3.0 V

COMP: Open

Source current1

Isrc-comp1

–13.5

–10

–6

μA

FB = 1.7 V

COMP = 2.5 V

Source current2

Isrc-comp2

Isrc-comp1

×3.3

Isrc-comp1

×3.0

Isrc-comp1

×2.7

μA

FB = 1.5 V

COMP = 2.5 V

Sink current

Isnk-comp

6

10

13.5

μA

FB = 3.5 V

COMP = 2.5 V

Transconductance

gm

25

46

75

μS

FB = 2.45V

↔ 2.55 V

COMP = 2.5 V

RT

RAMP offset voltage

Voff_ramp

—

1.0

—

V

*

1

RAMP amplitude

dVramp

2.90

3.1

3.3

V

*

2

RT voltage

V-rt

2.5

2.6

2.7

V

ZCD delay time

Zcd-delay

—

0.87

—

μs

RRT = 200 k

Maximum frequency

fmax

—

500

—

kHz

RRT = 200 k

Zero

current

detector

ZCD threshold voltage

Vzcd

1

3

6

mV

Input bias current

Ics

–58

–42

–25

μA

Vcs = 0 V

CS open detect

threshold voltage

Vcs-open

45

72.5

130

mV

Restart

Restart time delay

Tstart

75

150

330

μs

FB = 2.0 V

COMP = 2.5 V

Notes: *1 Design spec

*2 dVramp = Vclamp_comp – Voff_ramp