REV. 0
ADM1051/ADM1051A
–3–
ABSOLUTE MAXIMUM RATINGS*
(T
A
= 25°C unless otherwise noted)
V
CC
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 V
SHDN1, SHDN2 to GND . . . . . . . . –0.3 V to (V
CC
+ 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 V
CC
Continuous Power Dissipation (T
A
= 70°C) . . . . . . . 650 mW
8-Lead SOIC (Derate 8.3 mW/°C Above 70°C)
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.
THERMAL CHARACTERISTICS
8-Lead Small Outline Package:
θ
JA
= 150°C/W
ORDERING GUIDE
Temperature Package Package
Model Range Description Option
ADM1051JR 0°C to 70°C 8-Lead SOIC R-8
ADM1051AJR 0°C to 70°C 8-Lead SOIC R-8
PIN FUNCTION DESCRIPTIONS
Pin
No. Mnemonic Function
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.
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 GND Device Ground Pin.
5 SHDN1 Digital Input. Active-low shutdown con-
trol with 50 µA internal pull-up. See text for
more details of SHDN1 functionality.
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.
7 FORCE 1 Output of Channel 1 control amplifier to
gate of external N-channel MOSFET.
8V
CC
12 V Supply.
SHDN1
V
CC
ADM1051/
ADM1051A
SHDN2
1F
LEAVE OPEN OR
CONNECT TO
LOGIC SIGNALS
IF SHUTDOWN
REQUIRED
PHD55N03LT
FORCE 2
SENSE 2
100F
2ⴛ100F
V
OUT1
FORCE 1
SENSE 1
V
IN
3.3V
12V
MTD3055VL
100F
2ⴛ100F
V
OUT2
V
IN
3.3V
Figure 1. Test Circuit
PIN CONFIGURATION
TOP VIEW
(Not to Scale)
8
7
6
5
1
2
3
4
FORCE 2
SENSE 2
SHDN2
V
CC
FORCE 1
SENSE 1
SHDN1
GND
ADM1051/
ADM1051A
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body a
nd 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
