View AAT4615_277749.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

2.25A Current Limited Load Switch General Description
The AAT4615 SmartSwitchTM is a member of AnalogicTechTM's Application Specific Power MOSFETTM (ASPMTM) product family. It is a Current Limited P-channel MOSFET power switch designed for high-side load-switching applications. This switch operates with inputs ranging from 2.7V to 5.5V, making it ideal for both 3V and 5V systems. An integrated current-limiting circuit protects the input supply against large currents which may cause the supply to fall out of regulation. The AAT4615 is also protected from thermal overload which limits power dissipation and junction temperatures. It can be used to control loads that require up to 2.25A. Current limit threshold is programmed with a resistor from a SET pin to ground. The AAT4615 has an active shutdown load discharge circuit to rapidly turn off a load circuit when the switch is disabled. The reverse blocking feature prevents current from flowing from OUT to IN when disabled. This device has a programmable turn on delay time feature allowing turn-on time from 30s to 5ms using one small external capacitor. The quiescent supply current is typically a low 12A. In shutdown mode, the supply current decreases to less than 1A. The AAT4615 is available in a 12 pin TSOPJW package and is specified over a -40 to 85C temperature range.
AAT4615
Features
* * * * * * * * * * * * * *
SmartSwitchTM
VIN Range: 2.7 - 5.5 Volts Programmable current limit up to 2.25A Programmable turn-on time * 30s to 5ms Reverse Current Blocking Protection Fast shutdown load discharge Fast transient response: * 2.5s response to short circuit Low quiescent current * 12 A typical 1.0 A max with Switch off 72 m typical RDS(ON) at 5V Only 1.5V needed for ON/OFF Control Undervoltage Lockout Thermal shutdown Temperature range -40 to 85C Available in 12-pin TSOPJW package
Preliminary Information
Applications
* * * * * CF card port power protection Personal Data Assistants (PDA) Notebook computers Personal communication devices Hot swap supplies
Typical Application
INPUT C IN C DELAY GND
IN ON OD
AAT4615
GND
OUT COUT SET RSET
OUTPUT
GND
4615.2004.07.0.9
1
2.25A Current Limited Load Switch Pin Descriptions
Pin #
1,9,10,11,12 2,3,4 5
AAT4615
Symbol
IN OUT OD
Function
Input pins to the P-channel MOSFET source. Connect 1F capacitor from IN to GND. P-channel MOSFET drain connection. Connect a 0.47F capacitor from OUT to GND. On Delay. Turn on time delay control pin. A capacitor connected between this pin and ground will set the turn on delay time. Leave open circuit for the minimum turn on time. Current-Limit Set Input. A resistor from SET to ground sets the current limit for the switch. Active low enable input. A logic low turns the switch on. Device ground connection.
6 7 8
SET ON GND
Pin Configuration
TSOPJW-12 (Top View)
IN OUT OUT OUT OD SET
1 2 3 4 5 6
12 11 10 9 8 7
IN IN IN IN GND ON
2
4615.2004.07.0.9
2.25A Current Limited Load Switch Absolute Maximum Ratings
Symbol
VIN VON VSET, VOUT IMAX TJ
1
AAT4615
Description
IN to GND ON to GND SET, OUT to GND Maximum Continuous Switch Current Operating Junction Temperature Range
Value
-0.3 to 6 -0.3 to VIN+0.3 -0.3 to VIN+0.3 1.5 -40 to 150
Units
V V V A C
Note 1: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time.
Thermal Characteristics
Symbol
JA PD
Description
Maximum Thermal Resistance Maximum Power Dissipation 2, 3 (TA = 25C)
2
Value
160 625
Units
C/W mW
Note 2: Mounted on an FR4 board. Note 3: Derate 6.25mW/C above 25C.
Electrical Characteristics
Symbol
VIN IQ IQ(OFF) ISD(OFF) VUVLO RDS(ON) TCRDS ILIM ILIM(MIN) VON(L) VON(H) ION(SINK) TRESP TR TDEL_OFF TDEL_ON TSD THYS
1
VIN = 5V, TA = -40 to 85C unless otherwise noted. Typical values are at TA = 25C Description
Operation Voltage Quiescent Current Off Supply Current Off Switch Current Undervoltage Lockout On-Resistance On-Resistance Temp. Coefficient Current Limit Minimum Current Limit ON Input Low Voltage ON Input High Voltage ON Input leakage Current Limit Response Time Turn-On Rise Time Turn-Off Delay Time Turn-On Delay Time Over Temp Shutdown Threshold Over Temp Shutdown Hysteresis
Conditions
VIN = 5V, ON(ON) = active, IOUT = 0 ON(ON) = inactive, VIN = 5.5V ON(ON) = inactive, VIN = 5.5V, VOUT = 0 Rising edge, 1% hysteresis VIN =5.0V, TA=25C VIN =4.2V, TA=25C VIN =3.0V, TA=25C RSET = 6.8k VIN = 2.7 - 5.5V VIN = 2.7 - 5.5V VON = 5.5V VIN = 5V RO = 10 VIN = 5V VIN = 5.0V, OD = Open VIN = 5.0V, OD = 0.1F
Min
2.7
Typ
12 0.01 1.8 72 78 92 2800 1.0 120
Max
5.5 25 1 1 2.4 90 110 120 1.25 250 0.4 1
Units
V A A A V m ppm/C A mA V V A s s s s C C
0.75
1.4 0.01 2.5 14 5 28 5300 135 25
10 4000
15 60 6500
Notes: 1. The AAT4615 is guaranteed to meet performance specification over the -40 to 85C operating temperature range and are assured by design, characterization and correlation with statistical process controls.
4615.2004.07.0.9
3
2.25A Current Limited Load Switch Typical Characteristics
(Unless otherwise noted, VIN = 5V, TA = 25C) Quiescent Current vs. Input Voltage
13.0 18
AAT4615
Quiescent Current vs. Temperature
Quiescent Current (A)
Quiescent Current (A)
12.0 11.0 10.0 9.0 8.0 2.50
16 14 12 10 8 6
VIN = 5V
VIN = 3V
-40 -20 0 20 40 60 80 100
3.00
3.50
4.00
4.50
5.00
5.50
VIN (V)
Temperature (C)
Off-Supply Current vs. Temperature
1000 1000
Off-Switch Current vs. Temperature
Off-Supply Current (nA)
100
Off-Switch Current (nA)
100
10
10
1 -40 -20 0 20 40 60 80 100
1 -40 -20 0 20 40 60 80 100
Temperature (C)
Temperature (C)
RDS(ON) vs. Input Voltage
105 100 95 110 100
RDS(ON) vs. Temperature
VIN=3V VIN=4.2V VIN=5V
RDS(ON) (m)
RDS(ON) (m)
90 85 80 75 70 65 2.5 3.0 3.5 4.0 4.5 5.0 5.5
90 80 70 60 50 -40 -20 0 20 40
60
80
100
VIN (V)
Temperature (C)
4
4615.2004.07.0.9
2.25A Current Limited Load Switch Typical Characteristics
(Unless otherwise noted, VIN = 5V, TA = 25C) VIH and VIL vs. VIN
0.95 0.9 0.85
1.6
AAT4615
Current Limit ILIM vs. RSET
VIH
1.4 1.2
VIN - VOUT = 0.5V
VON (V)
0.8 0.75 0.7 0.65 0.6 2.5 3.0 3.5 4.0 4.5 5.0 5.5
I LIM (A)
1 0.8 0.6 0.4 0.2 0 1 10 100
VIL
VIN (V)
R SET (k )
Normalized ILIM vs. Temperature
1.04 39 37
Turn On Delay Time vs. VIN
COD = OPEN
Normalized ILIM
TDEL_ON (s)
1.02
35 33 31 29 27
1
0.98
0.96 -40 -20 0 20 40 60 80 100
25 2.5 3 3.5 4 4.5 5 5.5
Temperature (C)
VIN (V)
Turn On Delay Time vs. COD
100
Turn On Delay Time vs. Temperature
RO = 10, CO = 1F, COD = OPEN
60
TDEL_ON (ms)
TDEL_ON (s)
10
50
VIN = 3V
1
40
0.1
30
VIN = 5V
-40 -20 0 20 40 60 80 100
0.01 0.001
20
0.01 0.1 1 10 100 1000
COD (nF)
Temperature (C)
4615.2004.07.0.9
5
2.25A Current Limited Load Switch Typical Characteristics
(Unless otherwise noted, VIN = 5V, TA = 25C) Turn On Delay Time vs. Temperature
RO = 10, CO = 1F, COD = 20nF
1.12 1.1
AAT4615
Turn On Rise Time vs. Temperature
RO = 10, CO = 1F
20
TDEL_ON (s)
VIN = 3V tR (s)
1.08 1.06 1.04 1.02 -40 -20 0 20 40 60 80 100
15
VIN = 5V
10
VIN = 5V
5 -40 -20 0
VIN = 3V
20 40 60 80 100
Temperature (C)
Temperature (C)
Turn Off Delay Time vs. Temperature
RO = 10, CO = 1F
5.5 5.3
Turn-On Response
RO = 10, CO = 1F, COD = open, RSET = 6.8k VON (5V/div)
TDEL_OFF (s)
VIN = 3V
5.1 4.9 4.7 4.5 -40 -20 0 20 40 60 80 100
VOUT (5V/div) VIN = 5V IOUT (500mA/div)
0 20 40 60 80 100 120 140 160 180
Temperature (C)
Time (S)
Turn-Off Response
RO = 10, CO = 1F, RSET = 6.8k VONB (5V/div) VOUT (5V/div) IOUT (500mA/div)
0 5 10 15 20 25 30 35 40
Turn-On Response
RO = 10, CO = 220F, COD = open, RSET = 6.8k VONB (2V/div)
VOUT (2V/div) IOUT (500mA/div)
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Time (S)
Time (mS)
6
4615.2004.07.0.9
2.25A Current Limited Load Switch Typical Characteristics
(Unless otherwise noted, VIN = 5V, TA = 25C) Current Limit Transient Response Thermal Response
RSET = 6.8k
AAT4615
IOUT (2A/div) OUT short to 1 load VOUT (2V/div)
-1 0 1 2 3 4 5 6 7 8
VOUT (1V/div)
Thermal Cycling OUT short to 1 load
IOUT (0.5A/div)
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2
Short removed
1.4
1.6
1.8
Time (S)
Time (mS)
Output Current vs. Output Voltage
1400
Output Current (mA)
1200 1000 800 600 400 200 0 0
RSET = 6.8k
1 2 3 4 5
Output Voltage (V)
4615.2004.07.0.9
7
2.25A Current Limited Load Switch Functional Block Diagram
Reverse Blocking
AAT4615
VIN
Over - Temp. Protection Under Voltage Lockout
OUT
OD ON
Turn-On Delay
1.2V Reference
Current Limit Control
SET
GND
Functional Description
The AAT4615 is an integrated P-Channel MOSFET load switch with an adjustable current limit, programmable turn on time, over temperature protection, level shifted input with turn on timing control and a shutdown output discharge circuit. The current limit control is combined with an over temperature thermal limit circuit to provide a comprehensive system to protect the load switch under short circuit or other adverse operating conditions. The AAT4615 is ideally suited for control and protection of peripheral ports for CF cards and other low power external connections in compact portable products. The current limit and over temperature circuits will act independently. The device current limit is activated when the output load current exceeds an internal threshold level. The internal current limit threshold is determined by an external resistor connected between the SET pin and ground. The minimum current limit threshold is specified by
ILIM(MIN). If the load switch ambient temperature becomes excessive or if a short circuit condition persists, the die temperature will rise causing the over temperature protection circuit to activate. If a current limit level less than ILIM(MIN) is required, the AAT4615 can be used to operate in fold back current limit mode. To achieve this, an RSET value can be chosen to program a current limit lower than ILIM(MIN); in this case, when the load current reaches ILIM(MIN), the current will immediately drop, limiting at the programmed value. The AAT4615 has a turn on delay feature to suit different power up sequencing requirements. Start up times can be set by attaching a small ceramic capacitor between the on delay (OD) pin and ground. The AAT4615 will typically turn on in 30s with no capacitor connected. The turn on time can be slowed to 5ms with a 0.1F or more with a greater capacitor value. The load switch is turned off by applying a logic high level to the ON pin. When the device is in the shutdown mode, the output pin is connected to ground through a switch.
4615.2004.07.0.9
8
2.25A Current Limited Load Switch
The output discharge switch impedance to ground is less than 25 . The ON function has logic level thresholds that allow the AAT4615 to be TTL compatible and may also be controlled by 2.5V to 5.0V CMOS circuits. The voltage level applied to the ON pin should not exceed the input supply level present on the IN pin. The AAT4615 has an integrated reverse-current blocking feature to protect the system and prevent unwanted battery discharge. It stops current flowing from the OUT pin to the IN pin when the AAT4615 is in shutdown state. The AAT4615 typically consumes 12A when operating; when off, the device draws less than 1A. In the off state, current is prevented from flowing between the input and output.
AAT4615
Current Limit RSET Values
RSET () 40.2 30.9 24.9 22.1 19.6 17.8 16.2 14.7 13.0 10.5 8.87 7.50 6.80 6.04 5.49 5.10 4.64 4.22 3.74 3.24 2.80 2.61 2.49 2.32 Current Limit typ (mA) 200 250 300 350 400 450 500 550 600 700 800 900 1000 1100 1200 1300 1400 1600 1900 2200 2500 2700 2800 3000 Device will not current limit below: (mA) 150 188 225 263 300 338 375 413 450 525 600 675 750 825 900 975 1050 1200 1425 1650 1875 2025 2100 2250 Device always current limits below: (mA) 250 313 375 438 500 563 625 688 750 875 1000 1125 1250 1375 1500 1625 1750 2000 2375 2750 3125 3375 3500 3750
Turn On Delay COD Values
COD (nF) 0.1 0.22 0.47 1 2.2 4.7 10 22 47 100 220 470 1000 Turn On Delay (s) 34 40 55 85 150 300 633 1300 2600 5300 12000 26000 56400
4615.2004.07.0.9
9
2.25A Current Limited Load Switch Ordering Information
Package TSOPJW-12 Marking1 LNXYY ON/OFF Enable Active Low Part Number (Tape and Reel) AAT4615ITP-T1
AAT4615
Note 1: XYY = assembly and date code.
Package Information
TSOPJW-12
0.10 0.20 + 0.05 -
2.40 0.10
0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC
2.85 0.20
7 NOM 3.00 0.10
0.9625 0.0375 + 0.10 1.00 - 0.065
0.04 REF
0.055 0.045
4 4
0.010
0.15 0.05
0.45 0.15 2.75 0.25
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, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech's standard warranty. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 10
4615.2004.07.0.9

▲Up To Search▲

Price & Availability of AAT4615

	To Download AAT4615 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .