SiP4610A/B
Vishay Siliconix
Protected 1-A High-Side Load Switch
APPLICATIONS • Peripheral Ports
• Hot Swap • Notebook Computers • PDAs
FEATURES
• • • • • • • 1 A Continuous Output Current 2.4 V to 5.5 V Supply Voltage Range User Settable Current Limit Level Low Quiescent Current Undervoltage Lockout Thermal Shutdown Protection Compatible with AAT4610A • 4 kV ESD Rating-HBM
RoHS
COMPLIANT
DESCRIPTION
SiP4610A/B is a protected highside power switch. It is designed to operate from voltages ranging from 2.4 V to 5.5 V and handle a continuous current of 1 A. The user settable current limit protects the input supply voltage from excessive load currents that might cause a system failure. SiP4610A/B has a low quiescent current of 9 µA and in shutdown the supply current is reduced to less than 1 µA. In addition to current limit, the SiP4610A/B is protected by undervoltage lockout and thermal shutdown. There are two versions of the SiP4610. The SiP4610A has an active low enable input, while the SiP4610B has an active high enable input. The SiP4610A/B is available in a lead (Pb)-free 5-pin thin SOT-23 package for operation over the industrial temperature range of - 40 to 85 °C.
TYPICAL APPLICATION DIAGRAM
2.4 to 5.5 V CIN Enable
IN
OUT COUT
Load
SiP4610A/B
ON/ON GND RSET SET
GND
GND
Document Number: 73233 S-71061–Rev. J, 21-May-07
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SiP4610A/B
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND = 0 V)
Parameter VIN, VON, VON IMAX Storage Temperature Operating Junction Temperature Power Dissipationa, SOT-23 5-Pin Thermal Impedance (ΘJA) , SOT-23 5-Pin
b
Limit - 0.3 to 6 2 - 65 to 150 - 40 to 150 305 180
Unit V A °C °C mW °C/W
Notes: a. Derate 5.5 mW/°C above TA = 70 °C. b. Device mounted with all leads soldered or welded to PC board.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING RANGE (All voltages referenced to GND = 0 V)
Parameter IN Operating Temperature Range Limit 2.4 to 5.5 - 40 to 85 Unit V °C
SPECIFICATIONSa
Test Conditions Unless Specified Parameter Power Supplies Supply Voltage Quiescent Current Shutdown Current Switch Off Current Enable Inputs ON/ON High ON/ON Low ON/ON Leakage Current Turn Off Time Turn On Time Output On-Resistance Current Limit Minimum Current Limit Current Limit Response Time Undervoltage Lockout UVLO Threshold UVLO Hysteresis Thermal Shutdown Thermal Shutdown Threshold Hysteresis T THYST 20 165 °C VUVLO VHYST Rising Edge 1.8 0.05 2.4 V rDS IL IL(min) tRESP IN = 5 V IN = 5 V, TA = 25 °C IN = 3 V, TA = 25 °C RSET = 6.8 kΩ 0.75 145 190 1 130 4 180 230 1.25 mΩ A mA µs VIH VIL ILH tOFF tON IN = 2.4 V to 5.5 V ON/ON = 5 V IN = 5 V, RL = 10 Ω 11 65 2.0 0.8 1 21 200 µA µs V VIN IQ ISD IS(off) IN = 5 V, ON/ON = Active, lOUT = 0 A IN = 5 V, ON/ON = Inactive IN = 5 V, ON/ON = Inactive, VOUT = 0 V 2.4 9 5.5 25 1 1 µA V Symbol IN = 5 V, TA = - 40 to 85 °C Mina Limits Typb Maxa Unit
Notes: a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum ( - 40 to 85 °C). b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. c. Guaranteed by design.
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Document Number: 73233 S-71061–Rev. J, 21-May-07
SiP4610A/B
Vishay Siliconix
PIN CONFIGURATION, ORDERING INFORMATION, AND TRUTH TABLE
Thin SOT-23, 5-Pin
OUT 1 5 IN
GND
2
SET
3
4
ON/ON
Top View
ORDERING INFORMATION
Parameter SiP4610ADT-T1-E3 SiP4610BDT-T1-E3 XX = Lot Code W = Work week Code Eval Kit SiP4610DT Marking M1WXX M2WXX Temperature Range - 40 to 85 °C Package Thin SOT23-5
Temperature Range - 40 to 85 °C
Board Type
PIN DESCRIPTION
Pin Number 1 2 3 4 5 Name OUT GND SET ON/ON IN Function Switch Output. Ground pin. Current limit level set pin. The level is determinied by the value of a resistor connected from this pin to GND. Shutdown pin. ON, active low on the SiP4610A and ON, active high on the SiP4610B. Input supply voltage and switch input.
FUNCTIONAL BLOCK DIAGRAM
nW/L IN _ + OUT
W/L Under Voltage Lockout Thermal Shutdown + _ ON (SiP4610A) ON (SiP4610B) Reference Voltage
SET
GND
Figure 1. SiP4610 Block Diagram
Document Number: 73233 S-71061–Rev. J, 21-May-07
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SiP4610A/B
Vishay Siliconix
DETAILED DESCRIPTION
The SiP4610 limits load current by sampling the pass transistor current and passing that through an external resistor, RSET. The voltage across RSET, VSET, is then compared with an internal reference voltage, VREF. In the event that load current surpasses the set limit current, VSET will exceed VREF causing the pass transistor gate voltage to increase, thereby reducing the gate to source voltage of the PMOS switch and regulating its current back down to ILIMIT. VIN - VOUT will cause the chip to dissipate more heat. The power dissipation for the SiP4610 can be expressed as P = ILOAD x (VIN - VOUT) Once this exceeds the maximum power dissipation of the package, the die temperature will rise. When the die temperature exceeds an over-temperature limit of 165 °C, the SiP4610 will shut down until it has cooled down to 145 °C, before starting up again. As can be seen in the figure below, the SiP4610 will continue to cycle on and off until the load is reduced or the part is turned off (See Figure 2). The maximum power dissipation in any application is dependant on the maximum junction temperature, TJ(MAX) = 125 °C, the junction-to-ambient thermal resistance for the SOT23-5 package, θJ-A = 180 °C/W, and the ambient temperature, TA, which may be formulaically expressed as:
Setting the Current Limit Level
Setting the current limit level on the SiP4610 requires some care to ensure the maximum current required by the load will not trigger the current limit circuitry. The minimum current limit threshold should be determined by taking the maximum current required by the load, ILOAD, and adding 25 % headroom. The SiP4610 has a current limit tolerance of 25 %, which is largely a result of process variations from part to part, and also temperature and VIN/VOUT variances. Thus, to ensure that the actual current limit is never below the desired current limit a 1/0.75 = 1.33 coefficient needs to be added to the calculations. Knowing the maximum load current required, the value of RSET is calculated as follows. RSET = RSET coefficient/ILIMIT where ILIMIT = (ILOAD x 1.33) x 1.25 and RSET coefficient is 7100 for a 1 A current limit. For typical RSET coefficient values given a limit current refer to the "Typical Characteristics" section.
T (max) − T A P (max) = J θ J −A
=
125 − TA 180
It then follows that assuming an ambient temperature of 70 °C, the maximum power dissipation will be limited to about 305 mW.
Reverse Voltage
The SiP4610 is designed to control current flowing from IN to OUT. If the voltage on OUT is raised higher than IN current will flow from OUT to IN but the current limit function will not be available, as can be inferred from the block diagram in Figure 1. Thus, in applications were OUT is used to charge IN, careful considerations must be taken to limit current through the device and protect it from becoming damaged.
Operation at Current Limit and Thermal Shutdown
In the event that a load higher than ILIMIT is demanded of the SiP4610, the load current will stay fixed at the current limit established by RSET. However, since the required current is not supplied, the voltage at OUT will drop. The increase in
Figure 2. Current Over load Condition. Load Switch turned on with 0.1 Ω load at time = 0 ms.
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Document Number: 73233 S-71061–Rev. J, 21-May-07
SiP4610A/B
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
20 20
16 Quiescent Current (µA) Quiescent Current (µA)
16
12
12
8
8
4
4
0 - 40
0 - 20 0 20 40 60 80 100 120 0 1 2 3 4 5 6 VIN – Input Voltage (V)
Temperature (°C)
Quiescent Current vs. Temperature
1000 900 800 Output Current (A) 700 rDS(on) (mΩ) 600 500 400 300 200 100 0 0 1 2 3 4 5 0 0 50 RSET = 16.2 kΩ 150 200 250
Quiescent Current vs. Input Voltage
VIN = 3 V VIN = 5 V
100
20
40
60
80
100
120
VOUT - Output Voltage (V)
Temperature (°C)
Output Current vs. VOUT
1 10 1 0.1 Off Supply Current (µA) Off Switch Current (µA) 0.1
rDS(on) vs. Temperature
0.01
0.01
0.001
0.001
0.0001
0.0001
0.00001 - 40 - 20 0 20 40 60 80 100 120
0.00001 - 40 - 20 0 20 40 60 80 100 120
Temperature (°C)
Temperature (°C)
Off Supply Current vs. Temperature
Off Switch Current vs. Temperature
Document Number: 73233 S-71061–Rev. J, 21-May-07
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SiP4610A/B
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
120 15
100 Turn-On Time (µS)
VIN = 3 V Turn-Off Time (µS
13 VIN = 5 V 11 VIN = 3 V 9
80 VIN = 5 V 60
40
20
7
0 - 40
- 20
0
20
40
60
80
100
5 - 40
- 20
0
20
40
60
80
100
Temperature (°C)
Temperature (°C)
Turn-On vs. Temperature RL = 10 Ω , CL = 0.47 µF
2.0 100
Turn-Off vs. Temperature RL = 10 Ω , CL = 0.47 µF
1.5 RSET (kΩ )
VON (v)
1.0
10
0.5
0.0 2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
1 0.1
1 ILIMIT (A)
10
VIN – Input Voltage (V)
VIH vs. VIL vs. VIN
9 4 3 RSET ILIMIT Product (kΩ) 2 Current Limit (%) 8 1 0 -1 -2 -3 6 0.00 -4 - 50
RSET vs. ILIMIT
RSET = 22.1 k VIN – VOUT = 0.5 V
7
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
- 25
0
25
50
75
100
125
ILIMIT (A)
Temperature (°C)
RSET Coefficient vs. ILIMIT
Current Limit vs. Temperature
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Document Number: 73233 S-71061–Rev. J, 21-May-07
SiP4610A/B
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
250 VOUT = 5 V 200 200 250 VOUT = 5 V I(VOUT to VIN ) = 1 A
Rds (mΩ)
100
Rds (mΩ)
150
150
100
50
50
0 0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0 - 40
- 20
0
20
40
60
80
100
Current (A)
Temperature (°C)
Rds (VOUT to VIN) vs. Current
Rds (VOUT to VIN) vs. Temperature
TYPICAL WAVEFORMS
ON 2 V/div
ON, 2 V/div
OUT
2 V/div RL = 10 Ω CL = 0.47 µF 10 µs/div RL = 10 Ω CL = 0.47 µF 10 µs/div
OUT, 2 V/div
Turn On
Turn Off
VIN 2 V/div VIN 2 V/div
VOUT 2 V/div
2 V/div
VOUT
lout
2 A/div 2 µs/div 2 µs/div
lout
2 A/div
Short Circuit through 0.3 Ω, Vin = 3.3 V
Short Circuit through 0.3 Ω, Vin = 5 V
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see http://www.vishay.com/ppg?73233.
Document Number: 73233 S-71061–Rev. J, 21-May-07
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Package Information
Vishay Siliconix
THIN SOT-23 :
5- AND 6-LEAD (POWER IC ONLY)
e1 e1
5
4
6
5
4
E1
E
E1
E
1
2
3 −B−
1
2
3 − B−
e b
0.15
M
CB
A
e b
0.15
M
C
B
A
SOT23-5L Format
−A−
SOT23-6L Format
4xq1 0.17 Ref
D
C R A2 A R Seating Plane Q 4xq1 L (L1) L 2
Gauge Plane Seating Plane
0.08 C
−C− A1
MILLIMETERS Dim A A1 A2 b c D E E1 e e1 L L1 L2 R Q Q1 Min
0.91 0.01 0.90 0.30 0.10 2.90 2.70 1.525 1.80 0.30
INCHES Min
0.036 0.0004 0.035 0.012 0.004 0.114 0.106 0.060 0.070 0.012
Nom
1.00 0.05 0.95 0.32 0.15 3.05 2.85 1.65 0.95 BSC 1.90 0.40 0.60 REF 0.25 BSC
Max
1.10 0.10 1.00 0.45 0.20 3.10 2.98 1.70 2.00 0.60
Nom
0.039 0.002 0.037 0.013 0.006 0.120 0.112 0.065 0.0374 BSC 0.075 0.016 0.024 REF 0.010 BSC
Max
0.043 0.004 0.039 0.018 0.008 0.122 0.117 0.067 0.080 0.024
0.10 0_ 4_
− 4_ 10_ NOM
− 8_ 12_
0.004 0_ 4_
− 4_ 10_ NOM
− 8_ 12_
ECN: S-40083—Rev. A, 02-Feb-04 DWG: 5926 Document Number: 72821 29-Jan-04 www.vishay.com
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Legal Disclaimer Notice
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000 Revision: 11-Mar-11
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