ADP3178JR AD [Analog Devices], ADP3178JR Datasheet - Page 3

• Manufacturer Part Number: ADP3178JR
• Description: 4-Bit Programmable Synchronous Buck Controllers
• Manufacturer: AD [Analog Devices]

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.
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
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.
JA
Two-Layer Board . . . . . . . . . . . . . . . . . . . . . . . . . 125 C/W
Four-Layer Board . . . . . . . . . . . . . . . . . . . . . . . . . . 81 C/W
Model
ADP3158JR
ADP3178JR
LRDRV1
LRFB1
PIN CONFIGURATION
VID0
VID1
VID2
VID3
CS–
CS+
1
2
3
4
5
6
7
8
(Not to Scale)
ADP3158/
ADP3178
TOP VIEW
Temperature
Range
0 C to 70 C
0 C to 70 C
16
15
14
13
12
11
10
9
LRFB2
GND
DRVH
DRVL
VCC
LRDRV2
COMP
CT
LDO
Voltage
2.5 V, 1.8 V
Adjustable
ORDERING GUIDE
Package
Description
SO = Small Outline Package
SO = Small Outline Package
Pin
1–4
5, 12 LRFB1,
6, 11 LRDRV1,
7
8
9
10
13
14
15
16
Mnemonic
VID0–VID3
LRFB2
LRDRV2
CS–
CS+
CT
COMP
VCC
DRVL
DRVH
GND
PIN FUNCTION DESCRIPTIONS
Function
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.
ADP3158/ADP3178
WARNING!
Package
Option
R-16A (SO-16)
R-16A (SO-16)
ESD SENSITIVE DEVICE