TPS54262-EP Datasheet, PDF (1/48 Pages) Texas Instruments – 2-A 60-V Step-Down DC-DC Converter With Low I(q) and Voltage Supervisor

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TPS54262-EP 2-A 60-V Step-Down DC-DC Converter
With Low I(q) and Voltage Supervisor
TPS54262-EP
SLVSDP3 – DECEMBER 2016
1 Features
•1 Asynchronous Switch Mode Regulator
• Qualified for Automotive Applications
• 3.6-V to 48-V Operating Range, Withstands
Transients up to 60 V
• 2-A Maximum Load Current
• 50-µA Typical Quiescent Current
• 200-kHz to 2.2-MHz Switching Frequency
• 0.8 V ± 1.5% Voltage Reference
• High-Voltage Tolerant Enable Input
• Soft Start on Enable Cycle
• Slew Rate Control on Internal Power Switch
• Low-Power Mode for Light-Load Conditions
• Programmable Delay for Power-On Reset
• External Compensation for Error Amplifier
• Reset Function Filter Time for Fast Negative
Transients
• Programmable Overvoltage, Undervoltage Output
Monitor
• Thermal Sensing and Shutdown
• Switch Current Limit Protection
• Short Circuit and Overcurrent Protection of FET
• Junction Temperature Range: –55°C to 150°C
• 20-Pin HTSSOP PowerPAD™ Package
• Supports Defense, Aerospace, and Medical
Applications:
– Controlled Baseline
– One Assembly/Test Site
– One Fabrication Site
– Available in Extended (–55°C to 125°C)
Temperature Range
– Extended Product Life Cycle
– Extended Product-Change Notification
– Product Traceability
Simplified Schematic
D1
VBATT
C1
VIN ^{TPS54262 VReg}
R11
VIN
EN
R10
LPM
SYNC
R7
Rslew
C6
SS
RST
BOOT
PH
VSENSE
R8
RT/CLK
C2
Cdly
COMP
RST_TH
GND
OV_TH
R12
RESET
C3
L
D2
C7
R4
R9
VReg
C4
C8
C5
R6
R5
R1
R2
R3
Copyright © 2016, Texas Instruments Incorporated
1
2 Applications
• Automotive Telematics and eCall
• Automotive Infotainment and Cluster
– Head Unit
– Navigation
– Display
3 Description
The TPS54262-EP device is a 60-V, 2-A step-down
switch-mode power supply with a low-power mode
and a programmable voltage supervisor with an
integrated NMOS switching FET. 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. The device also features low-power mode
operation under light-load conditions which reduces
the supply current to 50 µA (typical). By pulling the
EN pin low, the supply shutdown current is reduced
to 1 µA (typical).
An open-drain reset signal indicates when the
nominal output drops below the reset threshold set by
an external resistor divider network. The output
voltage start-up ramp is controlled by a soft-start
capacitor. There is an internal undervoltage shutown
which is activated when the input supply ramps down
to 2.6 V. The device features a short circuit protection
circuit, which protects the device during overload
condition and also has a thermal shutdown
protection.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54262-EP
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Converter Efficiency
90
80 VIN = 14 V
70
60
VIN = 7 V
50
40
30
20
10
0
0.05
VReg = 5 V
fsw = 500 kHz
L = 22 µH
C = 100 µF
Rslew = 30 kW
TA = 25°C
0.5
1
1.5
2
ILoad - Load Current - A
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.