Document
Si4788CY
Vishay Siliconix
5-A Controlled Slew Rate Load Switch with Level Shift
FEATURES
D 5-A Maximum Load D Switches Voltages 1.8- to 5.5-V D Ground Referenced Logic Inputs D 1.8- to 5-V Logic Voltage Compatible D 25-mW Maximum On-Resistance D Level-Shifted Gate Drive Means The Control (Logic)
Voltage Is Independent Of Power Voltage
D Slow Turn-On (Controlled Slew Rate) Eliminates High Inrush Currents
D Low Power Consumption In Off State D Active Pull-Down On Output When In Off State D RoHS Compliant
Pb-free Available
DESCRIPTION The Si4788CY is a p-channel MOSFET with a logic interface. The control input is compatible with all types of logic down to 1.8 V. The switch can be used to control voltages from 1.8 V to 5.5 V, and the logic input can be a lower voltage than the power. The switch also incorporates reduced switching speed
to reduce inrush when switching loads with a high value of capacitance. The Si4788CY is packaged in an 8-pin SOIC package and rated for the commercial temperature range of 0 to 85_C.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
S
IN
Logic and Gate Drive
D
Document Number: 71100 S-50246—Rev. D, 21-Feb-05
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Si4788CY
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to GND VS, VDa . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 7.0 V VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 7.0 V Power Dissipation (Continuous)a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 W Pulsed Drain Current (IDM)b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 A
Continuous P-Switch Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 A
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55 to 150_C Notes a. Device mounted with all leads soldered to 1” x 1” FR4 with laminated
copper PC board. b. Pulse width p300 ms, dc p2%.
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
VS, VD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 V to 5.5 V VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 5.5 V
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . −25 to 85_C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25 to 150_C
This device has a maximum recommended operating junction temperature of 85_C. This temperature limit is used for electrical specifications such as logic transition voltages only and is not a reliability limit. The device can be used with junction temperatures up to 150_C if relaxed specifications can be tolerated, although limits for these specifications may not be given. Performance curves can be used to give an indication of specifications at higher temperatures, but are not guaranteed.
THERMAL RESISTANCE RATINGS
Parameter
Symbol
Typical
Maximum
Unit
Maximum Junction-to-AmbientNO TAG Maximum Junction-to-Foot (Drain)NO TAG
Steady State Steady State
RthJA RthJF
80 15
95 20 _C/W
Notes a. Surface Mounted on 1” x 1” FR4 Board. b. Junction-to-foot thermal impedance represents the effective thermal impedance of all heat carrying leads in parallel and is intended for use in conjunction with
the thermal impedance of the PC board pads to ambient (RthJA = RthJF + RthPCB-A). It can also be used to estimate chip temperature if power dissipation and the lead temperature of a heat carrying (drain) lead is known.
SPECIFICATIONS
Parameter
Symbol
Specific Test Conditions
Tempa
Limits Minb Typc
Maxb
Unit
On-Resistance
Pull-Down Resistance Leakage Current
Logic Input Voltage Low
Input Voltage High Turn-On Delay Turn-Off Delay Rise Time Fall Time Maximum Turn-On Slew Rate
rDS(on)
rPULL-DOWN IS(off)
VINL
VINH td(on) td(off) tRISE tFALL dv/dt
VS = 2.5 V, ID = 1 A, VIN = H VS = 3.3 V, ID = 1 A, VIN = H VS = 4.5 V, ID = 1 A, VIN = H
VS = 3.3 V to 5 V, VIN = L VS = 1.8 V to 5 V, VIN = L
VS = 3.3 V to 5 V VS = 1.8 V to 3.3 V VS = 3.3 V to 5 V VS = 1.8 V to 3.3 V
VIN = 5 V, ILOAD = 1 A, CLOAD = 100 mF Test Circuit 1
Room Room Room Room Room
Full Full Full Full Room Room Room Room Room
Notes a. Room = 25_C, Full = as determined by the operating temperature suffix. b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum. c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
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