ISL85402 データシートの表示（PDF） - Intersil

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ISL85402

2.5A Regulator with Integrated High-Side MOSFET for Synchronous Buck or Boost Buck Converter

Intersil 

ISL85402

Electrical Specifications Refer to “Block Diagram” on page 4 and “Typical Application Schematics” on page 5. Operating

Conditions Unless Otherwise Noted: VIN = 12V, or VCC = 4.5V ±10%, TA = -40°C to +105°C. Typicals are at TA = +25°C. Boldface limits apply

over the operating temperature range, -40°C to +105°C. (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

MAX

(Note 6) TYP (Note 6) UNITS

Minimum Output Voltage

0.5

V

Slew Rate

PFM MODE CONTROL

SR

CLOAD = 50pF

5

V/µs

Default PFM Current Threshold

MODE = VCC or Floating

700

mA

INTERNAL HIGH-SIDE MOSFET

Upper MOSFET rDS(ON)

LOW-SIDE MOSFET GATE DRIVER

rDS(ON)_UP

125 180 mΩ

LGate Source Resistance

100mA Source Current

3.5

Ω

LGATE Sink Resistance

100mA Sink Current

3.3

Ω

BOOST CONVERTER CONTROL

EXT_BOOST Boost_Off Threshold Voltage

0.74 0.8 0.86 V

EXT_BOOST Hysteresis Sink Current

AUXVCC Boost Turn-Off Threshold Voltage

IEXT_BOOST_HYS

2.4 3.2 3.8 µA

0.74 0.8 0.86 V

AUXVCC Hysteresis Sink Current

POWER-GOOD MONITOR

IAUXVCC_HYS

2.4 3.2 3.8 µA

Overvoltage Rising Trip Point

Overvoltage Rising Hysteresis

Undervoltage Falling Trip Point

Undervoltage Falling Hysteresis

PGOOD Rising Delay

PGOOD Leakage Current

PGOOD Low Voltage

OVERCURRENT PROTECTION

VFB/VREF

VFB/VOVTRIP

VFB/VREF

VFB/VUVTRIP

tPGOOD_DELAY

VPGOOD

Percentage of Reference Point

Percentage Below OV Trip Point

Percentage of Reference Point

Percentage Above UV Trip Point

fOSC = 500kHz

PGOOD HIGH, VPGOOD = 4.5V

PGOOD LOW, IPGOOD = 0.2mA

104 110 116 %

3

%

84

90

96

%

3

%

2

ms

10

nA

0.10

V

Default Cycle-by-Cycle Current Limit Threshold

Hiccup Current Limit Threshold

OVERVOLTAGE PROTECTION

IOC_1

IOC_2

ILIMIT = GND or VCC or Floating

Hiccup, IOC_2/IOC_1

3

3.6 4.2

A

115

%

OV Latching-off Trip Point

Percentage of Reference Point

LG = UG = LATCH LOW

120

%

OV Non-Latching-off Trip Point

Percentage of Reference Point

LG = UG = LOW

110

%

OV Non-Latching-off Release Point

Percentage of Reference Point

102.5

%

OVER-TEMPERATURE PROTECTION

Over-Temperature Trip Point

155

°C

Over-Temperature Recovery Threshold

140

°C

NOTE:

6. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization

and are not production tested.

8

FN7640.1

April 25, 2013

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