TPS54061-Q1_16 Datasheet, PDF (1/39 Pages) Texas Instruments – Synchronous Step-Down DC–DC Converter

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TPS54061-Q1
SLVSBM7A – MARCH 2013 – REVISED JANUARY 2016
TPS54061-Q1 Wide-Input, 60-V, 200-mA Synchronous Step-Down
DC–DC Converter With Low I_Q
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• Integrated High-Side and Low-Side MOSFETs
• Diode Emulation for Light-Load Efficiency
• Peak-Current Mode Control
• 90-µA Operating Quiescent Current
• 1.4-µA Shutdown Supply Current
• 50-kHz to 1.1-MHz Adjustable Switching
Frequency
• Synchronizes to External Clock
• 0.8 V ±1% Voltage Reference
• Stable With Ceramic Output Capacitors or Low-
Cost Aluminum Electrolytic
• Cycle-by-Cycle Current Limit, Thermal, OVP, and
Frequency Foldback Protection
• 3-mm x 3-mm, 8-Pin SON Package With Thermal
Pad
• –40°C to 150°C Operating Junction Temperature
2 Applications
• Low-Power Standby or Bias Voltage Supplies
• High-Efficiency Replacement for High-Voltage
Linear Regulators
3 Description
The TPS54061-Q1 device is a 60-V, 200-mA,
synchronous step-down DC-DC converter with
integrated high-side and low-side MOSFETs. Current-
mode control provides simple external compensation
and flexible component selection. The non-switching
supply current is 90 µA. Using the enable pin reduces
the shutdown supply current to 1.4 µA.
To increase light-load efficiency, the low-side
MOSFET emulates a diode when the inductor current
reaches zero.
The internal undervoltage lockout setting is 4.5 V, but
using two resistors on the enable pin can increase
the setting. The internal slow-start time controls the
output-voltage start-up ramp.
The adjustable switching-frequency range allows
optimization of efficiency and external component
size. Frequency foldback and thermal shutdown
protect the part during an overload condition.
The TPS54061-Q1 enables small designs by
integrating the MOSFETs and boot recharge diode,
and by minimizing the IC footprint with a small 3-mm
× 3-mm thermally-enhanced SON package.
The TPS54061-Q1 is supported in the WEBENCH™
Designer at www.ti.com.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54061-Q1
SON (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
VIN
VIN
BOOT
TPS54061-Q1
EN
PH
VOUT
RT /CLK
VSNS
COMP
GND
PowerPAD
100
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency
V_OUT = 5 V, f_SW = 50 kHz
V_OUT = 5 V, f_SW = 400 kHz
V_OUT = 3.3 V, f_SW = 400 kHz
0.010
Load Current (A)
0.100
1
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.