ADP3156JR-2.5 Analog Devices Inc, ADP3156JR-2.5 Datasheet - Page 3

• Manufacturer Part Number: ADP3156JR-2.5
• Description: IC REG BUCK DUAL SW 2.5V 16-SOIC
• Manufacturer: Analog Devices Inc

Specifications of ADP3156JR-2.5

• Rohs Status: RoHS non-compliant
• Applications: Controller, Intel Pentium® III
• Voltage - Input: 3V, 5V
• Number Of Outputs: 2
• Voltage - Output: 2.5V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)

Pin
1, 2, 15
3
4
5
6
7
8
9
10
11
12
13
14
16
ABSOLUTE MAXIMUM RATINGS*
Input Supply Voltage (V
Shutdown Input Voltage . . . . . . . . . . . . . . . . –0.3 V to +16 V
Operating Ambient Temperature Range . . . . . . 0 C to +70 C
Junction Temperature Range . . . . . . . . . . . . . . 0 C to +150 C
Storage Temperature Range . . . . . . . . . . . . –65 C to +150 C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300 C
*This is a stress rating only; operation beyond these limits can cause the device to
Model
ADP3156JR-1.5
ADP3156JR-1.8
ADP3156JR-2.5
REV. 0
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 ADP3156 features 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.
be permanently damaged.
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 C/W
Mnemonic
NC
AGND
SD
FB
V
SENSE–
SENSE+
C
CMP
PWRGD
V
DRIVE2
DRIVE1
PGND
LDO
CC
T
ORDERING GUIDE
Buck Converter
Output Voltage
1.5 V
1.8 V
2.5 V
CC
) . . . . . . . . . . . . . . . –0.3 V to +16 V
Analog Ground. All internal signals of the ADP3156 are referenced to this ground.
Connects to the internal resistor divider that senses the output voltage. This pin is also the refer-
(+) input for the current comparator. The output current is sensed as a voltage at this pin with
Power Good. An open drain signal indicates the output voltage is within a 5% regulation band.
Gate Drive for the (bottom) Synchronous Rectifier N-channel MOSFET. The voltage at DRIVE2
Gate Drive for the buck switch N-channel MOSFET. The voltage at DRIVE1 swings from
Power Ground. The drivers turn off the buck and synchronous MOSFETs by discharging their
Function
No Connect.
Shutdown. A logic high will place the ADP3156 in shutdown and disable both outputs. This pin
is internally pulled down.
Feedback connection for the linear controller. Connect this pin to the resistor divider network to
set the output voltage of the linear regulator.
Gate Drive for the linear regulator N-channel MOSFET.
ence input for the current comparator.
respect to SENSE–.
External Capacitor C
Error Amplifier output and compensation point. The voltage at this output programs the
output current control level between the SENSE pins.
Supply Voltage to ADP3156.
swings from ground to V
ground to V
gate capacitances to this pin. PGND should have a low impedance path to the source of the syn-
chronous MOSFET.
CC
PIN FUNCTION DESCRIPTIONS
Package
Option
R-16A/SO-16
R-16A/SO-16
R-16A/SO-16
.
T
connection to ground sets the off-time of the device.
CC
.
–3–
SENSE–
SENSE+
AGND
PIN CONFIGURATION
V
LDO
NC
NC
SD
FB
NC = NO CONNECT
1
2
3
4
5
6
7
8
16-Lead SOIC
(Not to Scale)
ADP3156
TOP VIEW
WARNING!
16
15
14
13
12
11
10
9
PGND
NC
DRIVE1
DRIVE2
V
PWRGD
CMP
C
CC
T
ESD SENSITIVE DEVICE
ADP3156