ADP3178JR データシートの表示（PDF） - Analog Devices

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ADP3178JR

4-Bit Programmable Synchronous Buck Controllers

Analog Devices 

ADP3158/ADP3178

ABSOLUTE MAXIMUM RATINGS*

VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +15 V

DRVH, DRVL, LRDRV1, LRDRV2 . . . . . –0.3 V to VCC + 0.3 V

All Other Inputs and Outputs . . . . . . . . . . . . –0.3 V to +10 V

Operating Ambient Temperature Range . . . . . . . 0°C to 70°C

Operating Junction Temperature . . . . . . . . . . . . . . . . . 125°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

θJA

Two-Layer Board . . . . . . . . . . . . . . . . . . . . . . . . . 125°C/W

Four-Layer Board . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . 215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C

*This is a stress rating only; operation beyond these limits can cause the device to

be permanently damaged. Unless otherwise specified, all voltages are referenced

to GND.

PIN CONFIGURATION

VID0 1

16 GND

VID1 2

15 DRVH

VID2 3 ADP3158/ 14 DRVL

VID3 4 ADP3178 13 VCC

TOP VIEW

LRFB1 5 (Not to Scale) 12 LRFB2

LRDRV1 6

11 LRDRV2

CS– 7

10 COMP

CS+ 8

9 CT

PIN FUNCTION DESCRIPTIONS

Pin Mnemonic Function

1–4 VID0–VID3

5, 12 LRFB1,

LRFB2

6, 11 LRDRV1,

LRDRV2

7 CS–

8 CS+

9 CT

10 COMP

13 VCC

14 DRVL

15 DRVH

16 GND

Voltage Identification DAC Inputs.

These pins are pulled up to an internal

reference, providing a Logic 1 if left

open. The DAC output programs the CS–

regulation voltage from 1.3 V to 2.05 V.

Feedback connections for the linear

regulator controllers.

Gate drives for the respective linear

regulator N-channel MOSFETs.

Current Sense Negative Node. Negative

input for the current comparator. This pin

also connects to the internal error ampli-

fier that senses the output voltage.

Current Sense Positive Node. Positive

input for the current comparator. The

output current is sensed as a voltage at this

pin with respect to CS–.

External capacitor connected from CT to

ground sets the Off-time of the device.

Error Amplifier Output and Compensation

Point. The voltage at this output programs

the output current control level between

CS+ and CS–.

Supply Voltage for the device.

Low-Side MOSFET Drive. Gate drive for

the synchronous rectifier N-channel

MOSFET. The voltage at DRVL swings

from GND to VCC.

High-Side MOSFET Drive. Gate drive

for the buck switch N-channel MOSFET.

The voltage at DRVH swings from GND

to VCC.

Ground Reference. GND should have a

low impedance path to the source of the

synchronous MOSFET.

Model

ADP3158JR

ADP3178JR

Temperature

Range

0°C to 70°C

0°C to 70°C

ORDERING GUIDE

LDO

Voltage

2.5 V, 1.8 V

Adjustable

Package

Description

SO = Small Outline Package

SO = Small Outline Package

Package

Option

R-16A (SO-16)

R-16A (SO-16)

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although

the ADP3158/ADP3178 feature proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions

are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

REV. A

–3–

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