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ADM1072 の電気的特性と機能

ADM1072のメーカーはAnalog Devicesです、この部品の機能は「Dual/ USB 2.0 Full/Standby Power Controller with Supply Steering」です。


製品の詳細 ( Datasheet PDF )

部品番号 ADM1072
部品説明 Dual/ USB 2.0 Full/Standby Power Controller with Supply Steering
メーカ Analog Devices
ロゴ Analog Devices ロゴ 




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ADM1072 Datasheet, ADM1072 PDF,ピン配置, 機能
=
Dual, USB 2.0 Full/Standby Power
Controller with Supply Steering
Preliminary Technical Data
ADM1072
FEATURES
500mA Load Current (100mA in Standby Mode)
135mOn Resistance
Switchable Current Limit
50µA Typical Quiescent Current
10nA Typical Shutdown Current
40nA Typical Switch Off Leakage
Short-Circuit Protection
Thermal Shutdown
FLT Outputs
Small, 16-Pin QSOP Package
APPLICATIONS
Desktop Computers
Palmtop Computers
Notebook Computers
Hand-Held Instruments
Universal Serial Bus (USB)
GENERAL DESCRIPTION
The ADM1072 is a logic controlled, dual P-channel switch
with low on resistance and a built-in current limiter, capable of
sourcing up to 1A from supply voltages between 2.7V and
5.5V. In addition to logic inputs that switch each channel on
and off, the device has a standby input that switches the output
current limit, making it ideal for use with USB peripherals. In
normal operating mode and Standby mode the output current
is typically limited to 500mA and 100mA respectively, as
outlined by the USB2.0 Specification. This allows the system
power supply to be protected against short-circuits and surge
currents in peripheral USB devices powered via the ADM1072.
Over-current and over-temperature conditions are signalled by
a fault output (FLT) for each channel.
The ADM1072 also offers low quiescent current of typically
50µA and shutdown current of typically 10nA.
MAIN_IN
(2.7V TO 5.5V)
22µF
2
3
14
15
1A MAIN FET
1A MIRROR
FET
STBY_IN
(2.7V TO
5.5V)
4.7µF
5
12
TO
CHANNEL 2
0.2A MAIN FET
0.2A
MIRROR FET
MIRROR
AMPLIFIER
1
4
120µF
OP1
O N 1 11
STBY 9
O N 2 10
CONTROL
LOGIC
UNDERVOLTAGE
SENSOR
CURRENT
LIMIT
AMPLIFIER
ADM1072
TEMPERATURE
SENSOR
OVERTEMP
1.24V
BANDGAP
REFERENCE
CURRENT
SETTING
RESISTOR
TO
CHANNEL
2
TO TO
CHANNEL
CHANNEL
22
CHANNEL 2 IS IDENTICAL TO CHANNEL 1
VPULLUP
0 TO
5.5V
FLT1
6
RPULLUP
10kTO
100k
VPULLUP
0 TO 5.5V
GND
8
RPULLUP
10kTO 100k
FLT2
7
13 OP2
16
120µF
Rev. PrE 1/02
FUNCTIONAL BLOCK DIAGRAM
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002

1 Page





ADM1072 pdf, ピン配列
ABSOLUTE MAXIMUM RATINGS*
(TA = +25°C unless otherwise noted)
MAIN_IN to GND . . . . . . . . . . . . . . . . . . . . . . –0.3V to +6V
ON1,ON1,FLT1, FLT2 to GND . . . . . . . . . . . –0.3V to +6V
OP1,OP2 to GND . . . . . . . . . . . . . . . . +0.3 V to (VIN + 0.3V)
Maximum Switch Current
Full Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Standby Power Mode . . . . . . . . . . . . . . . . . . . . . . . . 200mA
Continuous Power Dissipation (TA = +70oC) . . . . . 667mW
QSOP (derate 8.3mW/oC above +70oC)
Operating Temperature Range
Industrial (A Version) . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
*This is a stress rating only and functional operation of the device at these or any
other conditions above those indicated in the operation sections of this speci-
fication is not implied. Exposure to absolute maximum rating conditions for
extended periods of time may affect reliability.
THERMAL CHARACTERISTICS
16-Pin QSOP Package:
qJA = 105°C/Watt, qJC = 40°C/Watt
ORDERING GUIDE
Model
Temperature
Range
ADM1072ARQ -40°C to +85°C
Package
Description
16-Pin QSOP
Package
Option
RQ-16
Package
ADM1072
OP1 1
16 OP2
MAIN_IN 2
15 MAIN_IN
MAIN_IN 3
14 MAIN_IN
OP1 4
STBY_IN 5
FLT1 6
ADM 1072
T O P V IE W
(Not to Scale)
13 OP2
12 STBY_IN
11 ON1
FLT2 7
10 ON2
GND 8
9 STBY
Pin Configuration
Pin
2, 3, 14, 15
5, 12
1, 4
13, 16
6
7
8
9
10
11
Mnemonic
MAIN_IN
STBY_IN
OP1
OP2
FLT1
FLT2
GND
STBY
ON2
ON1
PIN FUNCTION DESCRIPTION
Function
Input to MAIN P-channel MOSFET source (both channels). Bypass MAIN_IN with a
22µF capacitor to ground.
Input to Standby P-channel MOSFET source (both channels) and supply to chip
circuitry. Bypass STBY_IN with a 4.7µF capacitor to ground.
Output from channel 1, P-channel MOSFET drains. Bypass OP1 with a 120µF capacitor
to ground.
Output from channel 2, P-channel MOSFET drains. Bypass OP2 with a 120µF capacitor
to ground.
Open-Drain Digital Output. FLT1 goes low when the channel 1 current limit is
exceeded for 10mS or the die temperature exceeds +150oC. During startup, FLT1
remains low for the turn-on time.
Open-Drain Digital Output. FLT2 goes low when the channel 2 current limit is
exceeded for 10mS or the die temperature exceeds +150oC. During startup, FLT2
remains low for the turn-on time.
Ground pin for all chip circuits.
Digital Input. Active high standby mode input. STBY = 0 sets normal operating mode
with 500mA current limit. STBY = 1 sets standby mode with 100mA current limit.
Digital Input. Active-low switch enable for channel 2 (logic 0 turns the switch on).
Digital Input. Active-low switch enable for channel 1 (logic 0 turns the switch on).
Rev. PrE 1/02
–3–


3Pages


ADM1072 電子部品, 半導体
ADM1072
Typical Performance Curves
A WDAAITTINAG
Figure 13. Switch Turn-On Time
A WDAAITTINAG
Figure 14. Switch Turn-Off Time
A WDAAITTINAG
Figure 15. USB Circuit Output Rise Time
A WDAAITTINAG
Figure 16 USB Circuit output Fall Time
–6– Rev. PrE 1/02

6 Page



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