TLV62565 Datasheet, PDF (1/22 Pages) Texas Instruments – 1.5-A High Efficiency Step-Down Converter in SOT23-5 Package

TLV62565
TLV62566
www.ti.com
SLVSBC1 – OCTOBER 2013
1.5-A High Efficiency Step-Down Converter in SOT23-5 Package
Check for Samples: TLV62565, TLV62566
FEATURES
1
• 2.7-V to 5.5-V Input Voltage Range
• 1.5-MHz Typical Switching Frequency
• Output Current up to 1.5 A (Max)
• Adaptive On-Time Current Control
• Power Save Mode for Light Load Efficiency
• 50-µA Operating Quiescent Current
• Up to 95% Efficiency
• Over Current Protection
• 95% Maximum Duty Cycle
• Excellent AC and Transient Load Response
• Power Good Output, TLV62566
• Internal Soft Startup of 250 µs (Typ)
• Adjustable Output Voltage
• Thermal Shutdown Protection
• Available in SOT23-5 Package
APPLICATIONS
• Portable Devices
• DSL Modems
• Hard Disk Drivers
• Set Top Box
• Tablet
DESCRIPTION
The TLV62565/6 devices are synchronous step-down
converters optimized for small solution size and high
efficiency. The devices integrate switches capable of
delivering an output current up to 1.5 A.
The devices are based on an adaptive on time with
valley current mode control scheme. Typical
operating frequency is 1.5 MHz at medium to heavy
loads. The devices are optimized to achieve very low
output voltage ripple even with small external
components and feature an excellent load transient
response.
During a light load, the TLV62565/6 automatically
enter into Power Save Mode at the lowest quiescent
current (50 μA typ) to maintain high efficiency over
the entire load current range. In shutdown, the
current consumption is reduced to less than 1 μA.
The TLV62565/6 provide an adjustable output voltage
via an external resistor divider. The output voltage
start-up ramp is controlled by an internal soft start,
typically 250 µs. Power sequencing is possible by
configuring the Enable (TLV62565) and Power Good
(TLV62566) pins. Other features like over current
protection and over temperature protection are built-
in. The TLV62565/6 devices are available in a
SOT23-5 package.
V_IN
2.7V to 5.5V
C1
4.7µF
VIN
SW
EN
FB
GND
TLV62565
L1
2.2µH
R1
240k
R2
120k
C2
10µF
V_OUT
1.8V
Figure 1. TLV62565 Typical Application
100
90
V_OUT=1. 8V
80
70
60
50
40
30
20
10
0
10µ
100µ
1m
10m
Load current [A]
VV_INin==22.7.7VV
VV_INin==33.6.6VV
VV_{INin==55.5.5VV}
100m
1
C001
Figure 2. TLV62565 Efficiency, 1.8 V_OUT
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 2013, Texas Instruments Incorporated