AAT4650IHS-T1 Advanced Analogic Technologies, Inc., AAT4650IHS-T1 Datasheet

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AAT4650IHS-T1

Manufacturer Part Number
AAT4650IHS-T1
Description
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer
Advanced Analogic Technologies, Inc.
Datasheet

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General Description
The AAT4650 SmartSwitch is a single channel PC
card (PCMCIA) power switch. It is used to select
between two different voltage inputs, each between
2.7V and 5.5V. An internal switch powers the cir-
cuitry from whichever input voltage is higher. The
device's output, V
rent limited, in compliance with PC card specifica-
tions. The current limit response time to a short cir-
cuit is typically 1µs. The internal P-channel MOSFET
switches are configured to break before make; that
is, both switches cannot be closed at the same time.
Controlled by a 2-bit parallel interface, the four states
for V
When in the ground state, V
a 5kΩ resistor. An open drain FAULT output is
asserted during over-current conditions. During
power-up slewing, FAULT also signals that V
of tolerance. An internal over-temperature sensor
forces V
temperature condition exists. Quiescent current is
typically a low 15µA, as long as I
approximately 500mA. Above this load current, the
quiescent current increases to 200µA.
The AAT4650 is available in a Pb-free, 8-pin SOP
or TSSOP package and is specified over the -40°C
to +85°C temperature range.
Typical Application
4650.2006.05.1.2
CC
are V
CC
to a high impedance state when an over-
V
V
CC5
GND
CC5
CC3
, V
CC
C
1μF
CC3
, is slew rate controlled and cur-
IN5
, high impedance, or ground.
CC
is pulled to ground by
FAULT
C
CC
1μF
CTL1
CTL0
IN3
is less than
CC
is out
8
5
3
2
4
1
VCC5
VCC3
CTL1
CTL0
FAULT
GND
AAT4650
Features
Applications
2.7V to 5.5V Input Voltage Range
80mΩ (5V) Typical R
Low Quiescent Current 15µA (typ)
Reverse-Blocking Switches
Short-Circuit Protection
Over-Temperature Protection
FAULT Flag Output
Temperature Range: -40°C to +85°C
8-Pin SOP or TSSOP Package
Notebook Computer
PDA, Subnotebook
Power Supply Multiplexer Circuit
5V/3V PC Card Power Switch
VCC
0.1μF
C
6,7
OUT
SmartSwitch
DS(ON)
V
GND
CC
AAT4650
1

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AAT4650IHS-T1 Summary of contents

Page 1

General Description The AAT4650 SmartSwitch is a single channel PC card (PCMCIA) power switch used to select between two different voltage inputs, each between 2.7V and 5.5V. An internal switch powers the cir- cuitry from whichever input voltage ...

Page 2

Pin Descriptions Pin # Symbol Function 1 GND Ground connection. 2 CTL0 Control input (see Control Logic Table below). 3 CTL1 Control input (see Control Logic Table below). 4 FAULT Open drain output; signals over-current condition. 5 VCC3 3V supply. ...

Page 3

Absolute Maximum Ratings T = 25°C, unless otherwise noted. A Symbol Description GND CC3 CC5 V OUT to GND CC I Maximum Continuous Switch Current MAX T Operating Junction Temperature Range J T Maximum Soldering ...

Page 4

Electrical Characteristics -40°C to +85°C, unless otherwise noted. Typical values are nate full temperature range. Symbol Description V Output CC High Impedance Output I Hi-Z CC Leakage Current Iccsc Short-Circuit Current ...

Page 5

Typical Characteristics Unless otherwise noted 25°C. A Quiescent Current vs. Temperature (I ) CC5 CTL0 = 5V CC3 CTL1 = 0V CC5 -40 -20 0 ...

Page 6

Typical Characteristics Unless otherwise noted 25°C. A Turn-On/Off Response (10Ω, 1µF Load) CTL1 (5V/div) FAULT (5V/div) V (2V/div (200mA/div) VCC3 Time (500µs/div) Thermal Shutdown Response CTL1 (5V/div) FAULT (5V/div) V (1V/div (500mA/div) VCC5 Time ...

Page 7

Functional Block Diagram Over- Temperature CTL1 CTL0 Functional Description The AAT4650 is a single channel power switch that can be used in any application where dual power supply multiplexing is required. Typical applications include PC card applications not requiring a ...

Page 8

Applications Information Input Capacitor A 1µF or larger capacitor is typically recommended for capacitor is not required for basic IN IN operation; however useful in preventing load transients from affecting up-stream circuits. should be ...

Page 9

Thermal issues are not a problem in the SOP-8 package since Θ , the package thermal resistance only 120°C/W. At any given ambient temperature (T ) the maximum package power dissipation can A be determined by the following ...

Page 10

Timing Diagram 5 CTL0 Vcc 0 t1, t2 Refer to V Switching Time specifications in the Electrical Characteristics section for definitions t10. CC Typical PC Card Application Circuit Power 5V Supply 3.3V C IN5 1μF ...

Page 11

Evaluation Board Layout The AAT4650 evaluation board layout follows the printed circuit board layout recommendations and can be used for good applications layout. Note: Board layout shown is not to scale. Figure 2: Evaluation Board Top Side Silk Screen Layout ...

Page 12

... BSC All dimensions in millimeters. 1. Sample stock is generally held on all part numbers listed in BOLD. 12 5V/3V PC Card Power Switch Marking Part Number (Tape and Reel) 4650 4650 SOP-8 0.375 ± 0.125 45° 0.825 ± 0.445 AAT4650 1 AAT4650IAS-T1 AAT4650IHS-T1 0.235 ± 0.045 4650.2006.05.1.2 ...

Page 13

All dimensions in millimeters. 4650.2006.05.1.2 TSSOP-8 12° REF × 4 3.00 ± 0.10 0.65 BSC 0.10 ± 0.05 12° DETAIL A AAT4650 5V/3V PC Card Power Switch 0.145 ± 0.055 4° ± 4° 0.60 ± ...

Page 14

... Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. ...

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