TPS65283_16 Datasheet, PDF (1/42 Pages) Texas Instruments – 4.5- to 18-V Input Voltage, Maximum 3.5-A/2.5-A Current, Synchronous Dual Buck Converter With Power Distribution Switch

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TPS65283, TPS65283-1
SLVSCL3C – JUNE 2014 – REVISED AUGUST 2014
TPS65283/-1 4.5- to 18-V Input Voltage, Maximum 3.5-A/2.5-A Current, Synchronous Dual
Buck Converter With Power Distribution Switch
1 Features
•1 Buck Converter
– Wide Input Voltage Range 4.5 to 18 V
– Integrated Dual Buck Converter, Maximum
Continuous Current 3.5 A (Buck1) / 2.5 A
(Buck2)
– Feedback Reference Voltage 0.6 V ±1%
– Adjustable Switching Frequency 200 kHz to
2 MHz
– Internal Built Soft Start Time 2.4 ms
– External Clock Synchronization
– Cycle-by-Cycle Current Limit
– Power Good Indicator for Each Buck
– Continuous Current Mode (TPS65283) or
Pulse Skipping Mode (PSM) (TPS65283-1) at
Light Load
• Power Distribution Switch
– Integrated a Power Distribution Switch With
On-Resistance 60 mΩ
– Operating Input Voltage Range 2.4 to 6 V
– Adjustable Current Limiting from 100 mA to
2.7 A
– Current-Limit Accuracy ±10% at 1.25 A
(Typical)
– Auto Recovery Overcurrent Protection
– Reverse Input to Output Voltage Protection
– Overtemperature Protection
– 24-Lead VQFN (RGE) 4-mm × 4-mm Package
2 Applications
• USB Ports and Hubs
• Set Top Box
• Digital TV
• DSL/Cable Modem, Wireless Router
• Home Gateway and Access Point Networks
• Car Infotainment
3 Description
The TPS65283, TPS65283-1 in thermally-enhanced
4-mm × 4-mm VQFN package is a full featured
4.5- to 18-V Vin, 3.5-A/2.5-A output current
synchronous step down DC-DC converter, which is
optimized for small designs through high efficiency
and integrating the high-side and low-side MOSFETs.
The device also incorporates one N-channel
MOSFET power switches for power distribution
systems. This device provides a total power
distribution solution, where precision current limiting
and fast protection response are required.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS65283
TPS65283-1
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Typical Schematic
Vout1
VIN
DVCC
PGOOD1
PGOOD2
TPS65283
TPS65283-1
17
FB1
18
COMP1
19
BST1
20
LX1
21
PGND1
22
VIN1
23
V7V
24
PGOOD1
1
PGOOD2
2 _EN1
3 _EN2
FB2 ¹⁴
COMP2 ¹³
12
BST2
11
LX2
PGND2 ¹⁰
9
VIN2
SW_IN ⁸
SW_OUT ⁷
6
nFAULT
5
SW_EN
Vout2
VIN
Vswout
nFAULT
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.002
Efficiency, Vin = 12 V, PSM
0.02
0.2
Loading (A)
Buck2 at 5 V
Buck1 at 1.2 V
2
C001
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.