TPS62400-Q1 Datasheet, PDF (1/42 Pages) Texas Instruments – 2.25-MHz 400-mA and 600-mA Dual Step-Down Converter

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TPS62400-Q1, TPS62402-Q1, TPS62404-Q1, TPS62405-Q1
SLVSA67E – FEBRUARY 2010 – REVISED JUNE 2015
TPS6240x-Q1 2.25-MHz 400-mA and 600-mA Dual Step-Down Converter
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Operating Junction Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C4B
• High Efficiency—Up to 95%
• V_IN Range From 2.5 V to 6 V
• 2.25-MHz Fixed-Frequency Operation
• Output Current 400 mA and 600 mA
• Adjustable Output Voltage From 0.6 V to V_IN
• Pin Selectable Output Voltage Supports Simple
Dynamic Voltage Scaling
• EasyScale™ Optional One-Pin Serial Interface
• Power-Save Mode at Light Load Currents
• 180° Out-of-Phase Operation
• Output-Voltage Accuracy in PWM Mode ±1%
• Typical 32-μA Quiescent Current for Both
Converters
• 100% Duty Cycle for Lowest Dropout
2 Applications
• Automotive
• Point of Load Regulator (POL)
• Car Infotainment and Navigation Systems
• ADAS Applications
V_IN 2.5 V to 6 V
10 µF
Simplified Schematic
TPS62402-Q1
VIN
FB1
SW1
2.2 µH
V_OUT1 = 1.2 V
400 mA
DEF_1
EN1
10 µF
EN2
MODE/
DATA
SW2
2.2 µH
ADJ2
GND
V_OUT2 = 3.3 V
600 mA
10 µF
3 Description
The TPS6240x-Q1 family of devices are synchronous
dual step-down DC-DC converters optimized for
battery-powered portable applications and automotive
systems. They provide two independent output
voltage rails powered by rechargeable batteries or
standard 3.3-V or 5-V voltage rail.
The EasyScale™ serial interface allows output-
voltages modification during operation. The fixed-
output-voltage versions, TPS62402-Q1,
TPS62404-Q1, and TPS62405-Q1 support one-pin-
controlled simple dynamic voltage scaling for low-
power processors.
The TPS6240x-Q1 operates at 2.25-MHz fixed
switching frequency and enters the power-save mode
operation at light load currents to maintain high
efficiency over the entire load-current range. For low-
noise applications, one can force the devices into
fixed-frequency PWM mode by pulling the
MODE/DATA pin high. The shutdown mode reduces
the current consumption to 1.2-μA, typical. The
devices allow the use of small inductors and
capacitors to achieve a small solution size.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS62400-Q1
TPS62402-Q1
TPS62404-Q1
VSON (10)
3.00 mm × 3.00 mm
TPS62405-Q1
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
TPS62402-Q1 Efficiency vs Output Current, V_OUT1
and V_OUT2
100
90
80
V_IN = 3.7 V
V_IN = 4.2 V
V_OUT2 = 3.3 V
MODE/DATA = Low
70
60
50
40
30
20
10
0
0.01
V_IN = 3.7 V
V_IN = 4.2 V
V_OUT1 = 1.2 V
MODE/DATA = Low
V_IN = 3.7 V
V_IN = 4.2 V
V_OUT2 = 3.3 V
MODE/DATA = High
V_IN = 3.7 V
V_IN = 4.2 V
V_OUT2 = 1.2 V
MODE/DATA = High
0.1
1
10
100
1000
Output Current (mA)
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.