TPS5120-EP Datasheet, PDF (1/23 Pages) Texas Instruments – DUAL OUTPUT, TWO-PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER

TPS5120ĆEP
DUAL OUTPUT, TWOĆPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER
D Controlled Baseline
− One Assembly/Test Site, One Fabrication
Site
D Extended Temperature Performance of
−55°C to 125°C
D Enhanced Diminishing Manufacturing
Sources (DMS) Support
D Enhanced Product-Change Notification
D Qualification Pedigree^†
D Independent Dual-Outputs Operate 180°
Out of Phase
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
Efficiency Under Light Loads
D Synchronous Buck Operation Allows up to
95% Efficiency
D Separate Standby Control and Overcurrent
Protection for Each Channel
D Programmable Short-Circuit Protection
† _{Component qualification in accordance with JEDEC and industry}
standards to ensure reliable operation over an extended
temperature range. This includes, but is not limited to, Highly
Accelerated Stress Test (HAST) or biased 85/85, temperature
cycle, autoclave or unbiased HAST, electromigration, bond
intermetallic life, and mold compound life. Such qualification
testing should not be viewed as justifying use of this component
beyond specified performance and environmental limits.
SGLS224A − JANUARY 2004 − REVISED APRIL 2006
D Low Supply (1 mA) and Shutdown (1 nA)
Current
D Power Good Output
D High-Speed Error Amplifiers
D Sequencing Easily Achieved by Selecting
Softstart Capacitor Values.
D 5-V Linear Regulator Power Internal IC
Circuitry
D 30-Pin TSSOP Packaging
DBT PACKAGE
(TOP VIEW)
INV1
1
FB1
2
SOFTSTART1
3
PWM/SKIP
4
CT
5
5V_STBY
6
GND
7
REF
8
STBY1
9
STBY2
10
FLT
11
POWERGOOD
12
SOFTSTART2
13
FB2
14
INV2
15
30
LH1
29
OUT1_u
28
LL1
27
OUT1_d
26
OUTGND1
25
TRIP1
24
V_CC
23
TRIP2
22
VREF5
21
REG5V_IN
20
OUTGND2
19
OUT2_d
18
LL2
17
OUT2_u
16
LH2
description
The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs 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.
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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Copyright  2006 Texas Instruments Incorporated
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