ADM1051/ADM1051A
ABSOLUTE MAXIMUM RATINGS*
(TA = 25°C unless otherwise noted)
PIN FUNCTION DESCRIPTIONS
Pin
No. Mnemonic Function
VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 V
SHDN1, SHDN2 to GND . . . . . . . . –0.3 V to (VCC + 0.3 V)
SENSE 1, SENSE 2 to GND . . . . . . . . . . . –0.3 V to +5.5 V
FORCE 1, FORCE 2 . . . . . . . Short-Circuit to GND or VCC
Continuous Power Dissipation (TA = 70°C) . . . . . . . 650 mW
8-Lead SOIC (Derate 8.3 mW/°C Above 70°C)
1
FORCE 2
Output of Channel 2 control amplifier
to gate of external N-channel MOSFET.
2
SENSE 2
Input from source of external MOSFET
to inverting input of Channel 2 control
amplifier, via output voltage-setting
feedback resistor network.
Operating Temperature Range
Commercial (J Version) . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage Temperature Range . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C
*This is a stress rating only; functional operation of the device at these or any other
conditions above those indicated in the operation sections of this specification is
not implied. Exposure to absolute maximum rating conditions for extended
periods of time may affect reliability.
3
SHDN2
Digital Input. Active-low shutdown
control with 50 µA internal pull-up. The
output of Channel 2 control amplifier goes
to ground when SHDN2 is taken low.
4
5
GND
Device Ground Pin.
SHDN1
Digital Input. Active-low shutdown con-
trol with 50 µA internal pull-up. See text for
more details of SHDN1 functionality.
THERMAL CHARACTERISTICS
8-Lead Small Outline Package:
θ
JA = 150°C/W
6
SENSE 1
Input from source of external MOSFET to
inverting input of Channel 1 control ampli-
fier, via output voltage-setting feedback
resistor network.
ORDERING GUIDE
Temperature
Range
Package
Description
Package
Option
7
8
FORCE 1
VCC
Output of Channel 1 control amplifier to
gate of external N-channel MOSFET.
12 V Supply.
Model
ADM1051JR
ADM1051AJR 0°C to 70°C
0°C to 70°C
8-Lead SOIC
8-Lead SOIC
R-8
R-8
12V
PIN CONFIGURATION
V
IN
3.3V
1F
V
CC
PHD55N03LT
FORCE 1
1
2
3
4
8
7
6
5
V
FORCE 2
SENSE 2
CC
100F
FORCE 1
SENSE 1
SHDN1
ADM1051/
ADM1051A
SHDN2
TOP VIEW
SENSE 1
V
OUT1
(Not to Scale)
GND
SHDN1
SHDN2
LEAVE OPEN OR
CONNECT TO
LOGIC SIGNALS
IF SHUTDOWN
REQUIRED
V
3.3V
IN
ADM1051/
ADM1051A
MTD3055VL
100F
FORCE 2
SENSE 2
V
OUT2
Figure 1. Test Circuit
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 ADM1051/ADM1051A 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.
WARNING!
ESD SENSITIVE DEVICE
REV. 0
–3–