AAT4650 SmartSwitch single channel card (PCMCIA) power switch. used se
|
|
|
Top Searches for this datasheet
5V/3V Card Power Switch General Description
AAT4650 SmartSwitch single channel card (PCMCIA) power switch. used select between different voltage inputs, each between 2.7V 5.5V. internal switch powers circuitry from whichever input voltage higher. device's output, VCC, slew rate controlled current limited, compliance with card specifications. current limit response time short circuit typically 1µs. internal P-channel MOSFET switches configured break before make; that both switches cannot closed same time. Controlled 2-bit parallel interface, four states VCC5, VCC3, high impedance, ground. When ground state, pulled ground resistor. open drain FAULT output asserted during over-current conditions. During power-up slewing, FAULT also signals that tolerance. internal over-temperature sensor forces high impedance state when overtemperature condition exists. Quiescent current typically 15µA, long less than approximately 500mA. Above this load current, quiescent current increases 200µA. AAT4650 available Pb-free, 8-pin TSSOP package specified over -40°C +85°C temperature range.
AAT4650
SmartSwitch
2.7V 5.5V Input Voltage Range (5V) Typical RDS(ON) Quiescent Current 15µA (typ) Reverse-Blocking Switches Short-Circuit Protection Over-Temperature Protection FAULT Flag Output Temperature Range: -40°C +85°C 8-Pin TSSOP Package
Applications
Notebook Computer PDA, Subnotebook Power Supply Multiplexer Circuit
Typical Application
VCC5 VCC3 CTL1 CTL0 FAULT
CIN5 CIN3
VCC5 VCC3 CTL1 AAT4650 CTL0 FAULT
COUT 0.1F
4650.2006.05.1.2
5V/3V Card Power Switch Descriptions
AAT4650
Symbol
CTL0 CTL1 FAULT VCC3 VCC5
Function
Ground connection. Control input (see Control Logic Table below). Control input (see Control Logic Table below). Open drain output; signals over-current condition. supply. Output (see Control Logic Table below). supply.
Configuration
SOP-8 TSSOP-8 (Top View)
CTL0 CTL1 FAULT
VCC5 VCC3
Control Logic Table
CTL1
CTL0
Function
Result
VCC5 VCC3 Both FETs
4650.2006.05.1.2
5V/3V Card Power Switch Absolute Maximum Ratings1
25°C, unless otherwise noted. Symbol
VCC3, VCC5 IMAX TLEAD VESD
AAT4650
Description
Maximum Continuous Switch Current Operating Junction Temperature Range Maximum Soldering Temperature Leads) Rating2
Value
-0.3 -0.3 Current Limited 4000
Units
Thermal Characteristics3
Symbol
Description
Thermal Resistance Power Dissipation SOP-8 TSSOP-8 SOP-8 TSSOP-8
Value
Units
°C/W
Stresses above those listed Absolute Maximum Ratings cause permanent damage device. Functional operation conditions other than operating conditions specified implied. Only Absolute Maximum Rating should applied time. Human body model 100pF capacitor discharged through 1.5k resistor into each pin. Mounted board. 4650.2006.05.1.2
5V/3V Card Power Switch Electrical Characteristics
-40°C +85°C, unless otherwise noted. Typical values 25°C; bold values designate full temperature range. Symbol
Output Hi-Z Iccsc RDS(ON) Tcrds High Impedance Output Leakage Current Short-Circuit Current Limit Resistance Mode, VCCIN -0.5V, Mode VCC3 VCC5 Selected, 25°C 3.0V, 25°C 5.0V, 25°C 2800 3.3V, ROUT 5.0V, ROUT 3.3V, RLOAD 5.0V, RLOAD 3.3V 3.3V, RLOAD 5.0V 5.0V, RLOAD 3.3V, RLOAD 5.0V, RLOAD 3.3V, RLOAD 5.0V, RLOAD 1000 1000 2000 1500 3000 3000 1500 2000 VCC3 VCC5 2.7V 3.6V VCC3 VCC5 4.5V 5.5V VCTL 5.5V ISINK VFAULT 5.5V 0.05 0.01
AAT4650
Description
Conditions
Units
Switch Resistance Temperature Coefficient Switching Time (Refer Figure Output Turn-On Delay Time Output Turn-On Delay Time Output Rise Time Output Rise Time Output Turn-Off Delay Time Output Turn-Off Delay Time Output Fall Time State Output Fall Time State Output Fall Time State Output Fall Time State Power Supply VCC3 VCC3 Operation Voltage VCC5 VCC5 Operation Voltage ICC3 VCC3 Supply Current
Off, VCC3 VCC5, 3.3V, VCC3 VCC5, Off, VCC5 VCC3, HiZ, VCC5 VCC3, 3.3V, VCC5 VCC3, VCC5 VCC3,
ICC5
VCC5 Supply Current
Parallel Interface VCTLLOW Input Voltage VCTLHI ISINKCTL VFAULTLOW ISINKFAULT Other OTMP Input High Voltage Input Leakage FAULT Logic Output Voltage FAULT Logic Output High Leakage Current Over-Temperature Shutdown
4650.2006.05.1.2
5V/3V Card Power Switch Typical Characteristics
Unless otherwise noted, 25°C.
Quiescent Current Temperature
(ICC5)
AAT4650
Current Limit
(VCC VCC3)
Quiescent Current
VCC3 CTL0 VCC5 CTL1
Temperature (°C)
Output Voltage
Current Limit
(VCC VCC5)
Off-Switch Current Temperature
(ICC3)
Off-Switch Current
1.0000 0.1000 0.0100 0.0010 0.0001 0.0000
VCC3 VCC5
CTL1 CTL0
Output Voltage
Temperature (°C)
Off-Switch Current Temperature
(ICC5)
RDS(ON) Temperature
120.0
Off-Switch Current
1.0000 0.1000 0.0100 0.0010 0.0001 0.0000
RDS(ON)
VCC5 CTL1 VCC3 CTL0
110.0 100.0 90.0 80.0 70.0 60.0
VCC3 3.0V VCC5 5.0V
Temperature (°C)
Temperature (°C)
4650.2006.05.1.2
5V/3V Card Power Switch Typical Characteristics
Unless otherwise noted, 25°C.
AAT4650
Turn-On/Off Response
(10, Load)
Turn-On/Off Response
(15, Load)
CTL1 (5V/div)
FAULT (5V/div)
CTL0 (5V/div) FAULT (5V/div) (2V/div) IVCC5 (200mA/div)
Time (500µs/div)
(2V/div) IVCC3 (200mA/div)
Time (500µs/div)
Thermal Shutdown Response
CTL1 (5V/div) FAULT (5V/div)
Short Circuit Through
Input Output
Input Voltage
Output
(1V/div)
Output Current
Output Voltage
IVCC5 (500mA/div)
Time (100ms/div)
Time
Short Circuit Through
Input Output
Input Voltage Output Current Output Voltage
Output
Time
4650.2006.05.1.2
5V/3V Card Power Switch Functional Block Diagram
VCC3 VCC5
AAT4650
Body Control
OverCurrent
OverCurrent
OverTemperature
Slew Rate
Slew Rate
FAULT
CTL1 CTL0
Control Logic
Functional Description
AAT4650 single channel power switch that used application where dual power supply multiplexing required. Typical applications include card applications requiring power supply, applications where power switched, example, between operation 3.3V standby mode. AAT4650 operates with input voltages ranging from 2.7V 5.5V combination automatically powers internal circuitry whichever input voltage higher. identical RDS(ON) P-channel MOSFETs serve power multiplexing circuit with common drain output independent sources VCC3 VCC5 inputs. 2-bit parallel interface determines state multiplexer: VCC3, VCC5, with resistive pull down ground, high impedance. When state either inputs, multiplexing circuit will
slowly slew output voltage level which protects upstream power supply from sudden load transients. When resistive pull down chosen VCC, output quickly discharged resistive pull down. AAT4650 always serves electronic fuse limiting load current exceeds current limit threshold. During power-up into short, current will gradually increase until current limit reached. During sudden short circuit output, current limit will respond isolate protect upstream power supply from load short circuit. most applications, because response time fast, short circuit will affect upstream supply, system functionality will affected. case over-current condition, open drain FAULT flag output will signal event. FAULT output also active during output voltage slew, becomes inactive once output within regulation.
4650.2006.05.1.2
5V/3V Card Power Switch Applications Information
Input Capacitor
larger capacitor typically recommended CIN. capacitor required basic operation; however, useful preventing load transients from affecting up-stream circuits. should located close device practically possible. Ceramic, tantalum, aluminum electrolytic capacitors selected CIN. There specific capacitor equivalent series resistance (ESR) requirement CIN. However, higher current operation, ceramic capacitors recommended their inherent capability over tantalum capacitors withstand input current surges from impedance sources such batteries portable devices.
AAT4650
Voltage Regulation
card specification calls regulated supply tolerance ±5%. this, typical power supply will drop less than traces will drop another This leaves AAT4650 card switch. card application, maximum allowable current AAT4650 dominated voltage regulation, rather than thermal considerations, either current limit maximum RDS(ON) Pchannel MOSFET. maximum RDS(ON) 85°C calculated applying temperature coefficient maximum room temperature RDS(ON):
RDS(ON)(MAX) RDS(ON)25
Output Capacitor
0.1µF greater capacitor generally required between GND. Likewise, with output capacitor, there specific capacitor requirement. desired, COUT increased accommodate load transient condition.
-or-
RDS(ON)(MAX) 100m [0.0028 60]) 116.8m
Parallel Interface Break Before Make
2-bit parallel interface determines state output. logic levels compatible with CMOS logic. logic value must less than 0.8V, logic high value must greater than 2.4V. cases where interface pins rapidly change state directly from vice versa), internal break-before-make circuitry prevents back flow current from input power supply other. addition, body connections internal P-channel MOSFET switches always highest potential VCC3, VCC5, VCC, which prevents body diode conduction, power supply backflow, possible device damage.
maximum current equal tolerance supply (100mV) across AAT4650 divided RDS(ON)(MAX).
IMAX5
100mV 856.2mA 116.8m
3.3V supply card application, conditions relaxed, with allowable voltage regulation drop equal 300mV. With supply trace regulation, card switch have 200mV drop.
IMAX3
200mV 1.5A 134m
FAULT Output
FAULT output pulled ground open drain N-channel MOSFET during over-current output slew condition. should pulled reference power supply controller nominal 100k resistor. Since 1.5A nominal current limit value, AAT4650 will current limit before IMAX3 reached.
4650.2006.05.1.2
5V/3V Card Power Switch
Thermal issues problem SOP-8 package since package thermal resistance, only 120°C/W. given ambient temperature (TA) maximum package power dissipation determined following equation:
TJ(MAX)
AAT4650
PD(MAX)
Constants AAT4650 maximum junction temperature, TJ(MAX) 125°C, package thermal resistance, 120°C/W. Worst case conditions calculated maximum operating temperature where 85°C. Typical conditions calculated under normal ambient conditions where 25°C. 85°C, PD(MAX) 333mW. 25°C, PD(MAX) 833mW. Maximum current given following equation:
over-current threshold. This results voltage drop across AAT4650 which causes excess power dissipation package temperature increase. begins heat over-temperature circuit activated. temperature reaches maximum level, AAT4650 automatically switches P-channel MOSFETs. While they off, over-temperature circuit remains active. Once temperature cooled approximately 10°C, P-channel MOSFETs switched back this manner, AAT4650 thermally cycled until short circuit removed. Once short removed, normal operation automatically resumes. save power, full high-speed over-current circuit activated until lower threshold current (approximately 500mA) exceeded power device. When load current exceeds this crude threshold, AAT4650 quiescent current increases from 15µA 200µA. high-speed over-current circuit works linearly limiting current when current limit reached. voltage begins drop current limiting, current limit magnitude varies generally decreases voltage drops
IOUT(MAX)
PD(MAX) RDS(ON)
AAT4650 85°C, IOUT(MAX) 1.65A, value greater than internal minimum current limit specification.
Switching Voltage
AAT4650 meets card standards switching output providing ground path VCC, well high impedance state. card protocol determining voltage operations first power peripheral with poll 3.3V operation. When transitioning from 3.3V, must discharged less than 0.8V provide hard reset. resistive ground state (CTL1 CTL0 will accommodate this. ground state will also guarantee voltage discharged within specified amount time (100ms).
Over-Current Over-Temperature Protection
Because many AAT4650 applications provide power external devices, designed protect host device from malfunctions those peripherals through slew rate control, current limiting, thermal limiting. AAT4650 current limit thermal limit serve immediate reliable electronic fuse without increase RDS(ON) this function. Other solutions, such poly fuse, protect host power supply system from mishandling short circuiting peripherals; they will only prevent fire. AAT4650 high-speed current limit thermal limit only prevent fires, they also isolate power supply entire system from activity external port report mishap means FAULT signal. Over-current over-temperature hand hand. Once over-current condition exists, current supplied load AAT4650 limited
4650.2006.05.1.2
Printed Circuit Board Layout Recommendations
proper thermal management, minimize trace resistance, take advantage RDS(ON) AAT4650, circuit board layout rules should followed: VCC3, VCC5, should routed using wider than normal traces; pins (Pins should connected same wide trace; should connected ground plane. best performance, COUT should placed close package pins.
5V/3V Card Power Switch Timing Diagram
CTL0,1
AAT4650
Figure Switching Time Diagram.
Refer Switching Time specifications Electrical Characteristics section definitions t10.
Typical Card Application Circuit
Power Supply 3.3V
CIN5
100k
Card Controller
CIN3
VCC5 VCC3 CTL1 AAT4650 CTL0 FAULT
Card Slot
COUT 0.1F
FAULT CTL1 CTL0
4650.2006.05.1.2
5V/3V Card Power Switch Evaluation Board Layout
AAT4650 evaluation board layout follows printed circuit board layout recommendations used good applications layout. Note: Board layout shown scale.
AAT4650
Figure Evaluation Board Side Silk Screen Layout Assembly Drawing.
Figure Evaluation Board Component Side Layout.
Figure Evaluation Board Solder Side Layout.
4650.2006.05.1.2
5V/3V Card Power Switch Ordering Information
Package
SOP-8 TSSOP-8
AAT4650
Marking
4650 4650
Part Number (Tape Reel)1
AAT4650IAS-T1 AAT4650IHS-T1
AnalogicTech products offered Pb-free packaging. term "Pb-free" means semiconductor products that compliance with current RoHS standards, including requirement that lead exceed 0.1% weight homogeneous materials. more information, please visit website
Package Information
SOP-8
3.90 0.10
4.90 0.10
6.00 0.20
0.375 0.125
1.55 0.20
0.175 0.075
0.235 0.045 0.825 0.445
0.42 0.09
1.27
dimensions millimeters.
Sample stock generally held part numbers listed BOLD.
4650.2006.05.1.2
5V/3V Card Power Switch
TSSOP-8
AAT4650
4.40 0.10
6.40 0.20
3.00 0.10 0.65
1.05
1.20
0.145 0.055
0.245 0.055
0.10 0.05
0.60 0.15 1.00
DETAIL
dimensions millimeters.
4650.2006.05.1.2
5V/3V Card Power Switch
AAT4650
Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility circuitry other than circuitry entirely embodied AnalogicTech product. circuit patent licenses, copyrights, mask work rights, other intellectual property rights implied. AnalogicTech reserves right make changes their products specifications discontinue product service without notice. Customers advised obtain latest version relevant information verify, before placing orders, that information being relied current complete. products sold subject terms conditions sale supplied time order acknowledgement, including those pertaining warranty, patent infringement, limitation liability. AnalogicTech warrants performance semiconductor products specifications applicable time sale accordance with AnalogicTech's standard warranty. Testing other quality control techniques utilized extent AnalogicTech deems necessary support this warranty. Specific testing parameters each device necessarily performed. AnalogicTech AnalogicTech logo trademarks Advanced Analogic Technologies Incorporated. other brand product names appearing this document registered trademarks trademarks their respective holders.
Advanced Analogic Technologies, Inc.
Arques Avenue, Sunnyvale, 94085 Phone (408) 737-4600 (408) 737-4611
4650.2006.05.1.2
Other recent searches
MA346 - MA346 MA346 Datasheet
M3D744 - M3D744 M3D744 Datasheet
LM4040 - LM4040 LM4040 Datasheet
FMS006-3710-0 - FMS006-3710-0 FMS006-3710-0 Datasheet
FMA006-3700-0 - FMA006-3700-0 FMA006-3700-0 Datasheet
DF2S6 - DF2S6 DF2S6 Datasheet
BCR146 - BCR146 BCR146 Datasheet
BCR146 - BCR146 BCR146 Datasheet
BCR146T - BCR146T BCR146T Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
