TPS54362-Q1, TPS54362A-Q1
www.ti.com
SLVS845D –MARCH 2009–REVISED OCTOBER 2011
3A, 60V STEP DOWN DC/DC CONVERTER WITH LOW Iq
Check for Samples: TPS54362-Q1, TPS54362A-Q1
1
FEATURES
•
Reset Function Filter Time for Fast Negative
Transients
2
•
Withstands Transients up to 60V With an
Operating Range of 3.6V to 48V
•
•
Programmable Overvoltage Output Monitoring
Programmable Undervoltage Output
Monitoring, Issuance of Reset if Output Falls
Below Threshold
•
Asynchronous Switch Mode Regulator With
External Components (L and C), Load Current
up to 3A (max)
•
Thermal Shutdown During Excessive Power
Dissipation
•
•
•
0.8V ± 1.5% Voltage Reference
200kHz to 2.2MHz Switching Frequency
•
•
Switch Current Limit Protection
High Voltage Tolerant Enable Input for ON/OFF
State
Short Circuit and Overcurrent Protection of
FET
•
•
•
•
Soft Start on Enable Cycle
•
•
•
Junction Temperature Range: –40°C to 150°C
Package: 20-pin HTSSOP PowerPAD™
Qualified for Automotive Applications
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)
APPLICATIONS
•
•
•
•
Automotive Telematics
Navigation systems
•
External Compensation for Wide Bandwidth
Error Amplifier
•
•
Internal Undervoltage Lock Out UVLO
Programmable Reset Power on Delay
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.
VIN
LPM
VIN
EN
95%
90%
85%
80%
75%
70%
90%
85%
80%
Supply
Rslew
Rslew = 5kW
SS
V
= 6 V
IN
SYNC
nRST
RT
TPS54362
VReg
Rslew = 35kW
BOOT
V
= 20 V
IN
75%
70%
PH
Vreg
V
= 12 V,
VReg = 5 V,
Fsw = 500 kHz,
L = 22 mH
IN
VReg = 5 V,
Fsw = 500 kHz,
L = 22 mH
Cdly
GND
C
= 100 mF
VSENSE
COMP
O
65%
60%
C
T
= 100 mF,
= 25oC
Rslew = 5 kW,
= 25oC
65%
60%
O
T
A
A
RST_TH
OV_TH
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
I
- Load Current - A
I
- Load Current - A
L
L
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.
2
PowerPAD is a trademark of Texas Instruments.
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