TPS54362-Q1 Datasheet, PDF (1/35 Pages) Texas Instruments – 3A, 60V STEP DOWN DC/DC CONVERTER WITH LOW Iq

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TPS54362-Q1, TPS54362A-Q1
SLVS845D – MARCH 2009 – REVISED OCTOBER 2011
3A, 60V STEP DOWN DC/DC CONVERTER WITH LOW Iq
Check for Samples: TPS54362-Q1, TPS54362A-Q1
FEATURES
1
•2 Withstands Transients up to 60V With an
Operating Range of 3.6V to 48V
• Asynchronous Switch Mode Regulator With
External Components (L and C), Load Current
up to 3A (max)
• 0.8V ± 1.5% Voltage Reference
• 200kHz to 2.2MHz Switching Frequency
• High Voltage Tolerant Enable Input for ON/OFF
State
• Soft Start on Enable Cycle
• Slew Rate Control on Internal Power Switch
• External Clock Input for Synchronization
• Pulse Skip Mode (PFM) During Light Output
Loads With Quiescent Current = 65μA Typical
(LPM Operation)
• External Compensation for Wide Bandwidth
Error Amplifier
• Internal Undervoltage Lock Out UVLO
• Programmable Reset Power on Delay
• Reset Function Filter Time for Fast Negative
Transients
• Programmable Overvoltage Output Monitoring
• Programmable Undervoltage Output
Monitoring, Issuance of Reset if Output Falls
Below Threshold
• Thermal Shutdown During Excessive Power
Dissipation
• Switch Current Limit Protection
• Short Circuit and Overcurrent Protection of
FET
• Junction Temperature Range: –40°C to 150°C
• Package: 20-pin HTSSOP PowerPAD™
• Qualified for Automotive Applications
APPLICATIONS
• Automotive Telematics
• Navigation systems
• In-Dash Instrumentation
• Battery Powered Applications
DESCRIPTION
The TPS54362/TPS54362A is a step down switch mode power supply with voltage supervisor. Integrated input
voltage line feed forward topology improves line transient regulation of the voltage mode buck regulator. The
regulator has a cycle-by cycle current limit. A pulse skip mode operation under no load reduces the supply
current to 65μA. Using the enable pin, the supply shutdown current is reduced to 1μA.
Supply
LPM
VIN
VIN
Rslew
EN
SS
SYNC
TPS54362
nRST
VReg
RT
BOOT
PH
Cdly
GND
VSENSE
COMP
RST_TH
OV_TH
90%
95%
Rslew = 5kW
85%
90%
V_IN = 6 V
80%
85%
Rslew = 35kW
80%
75%
V_IN = 20 V
Vreg
V_IN = 12 V,
75%
VReg = 5 V,
70%
VReg = 5 V,
Fsw = 500 kHz,
Fsw = 500 kHz,
70%
L = 22 mH
L = 22 mH
C_O = 100 mF
65%
C_O = 100 mF,
65%
Rslew = 5 kW,
T_A = 25^oC
T_A = 25^oC
60%
60%
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
I_L - Load Current - A
I_L - Load Current - A
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009–2011, Texas Instruments Incorporated