TPS5120-Q1 Datasheet, PDF (1/21 Pages) Texas Instruments – DUAL OUTPUT, TWO-PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER

TPS5120ĆQ1
DUAL OUTPUT, TWOĆPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER
SGLS225B − JANUARY 2004 − REVISED APRIL 2008
D Qualified for Automotive Applications
D Sequencing Easily Achieved by Selecting
D Independent Dual-Outputs Operate 180°
Out of Phase
Softstart Capacitor Values.
D 5-V Linear Regulator Power Internal IC
D Wide Input Voltage Range: 4.5-V − 28-V
D Adjustable Output Voltage Down to 0.9 V
D Pin-Selectable PWM/SKIP Mode for High
Circuitry
D 30-Pin TSSOP Packaging
D Gate Leakage Test Passing Level is 50 V
Efficiency Under Light Loads
DBT PACKAGE
D Synchronous Buck Operation Allows up to
(TOP VIEW)
95% Efficiency
D Separate Standby Control and Overcurrent
INV1
1
FB1
2
30
LH1
29
OUT1_u
Protection For Each Channel
SOFTSTART1
3
28
LL1
D Programmable Short-Circuit Protection
D Low Supply (1 mA) and Shutdown (1 nA)
Current
D Power Good Output
PWM/SKIP
4
CT
5
5V_STBY
6
GND
7
REF
8
27
OUT1_d
26
OUTGND1
25
TRIP1
24
V_CC
23
TRIP2
D High-Speed Error Amplifiers
STBY1
9
STBY2
10
22
VREF5
21
REG5V_IN
FLT
11
20
OUTGND2
description
POWERGOOD
12
SOFTSTART2
13
19
OUT2_d
18
LL2
The TPS5120 is a dual channel, high-efficiency
synchronous buck controller where the outputs
FB2
14
INV2
15
17
OUT2_u
16
LH2
run 180 degrees out of phase, which lowers the
input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode
to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating
frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load
conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent
current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A
(typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel
MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply
design and reduce the external parts count. Each channel is independent, offering a separate controller,
overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different
softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage,
undervoltage, and programmable short-circuit protection promote system reliability.
ORDERING INFORMATION{
PACKAGE}
TA
TSSOP
(DBT)
−40°C to 125°C TPS5120QDBTRQ1
† _{For the most current package and ordering}
information, see the Package Option
Addendum at the end of this document, or
see the TI web site at http://www.ti.com.
‡ _{Package drawings, thermal data, and}
symbolization are available at
http://www.ti.com/packaging.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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