TPS542941RSAT.A中文资料德州仪器数据手册PDF规格书

1FEATURES

2• D-CAP2™ Control Mode

– Fast Transient Response

– No External Parts Required For Loop

Compensation

– Compatible with Ceramic Output

Capacitors

• Wide Input Voltage Range : 4.5 V to 18 V

• Output Voltage Range : 0.76V to 7V

• Highly Efficient Integrated FETs Optimized for

Low Duty Cycle Applications D–

150 mΩ (High Side) and 100 mΩ (Low Side)

• High Initial Reference Accuracy

• 2A CH1 / 3A CH2 Continuous Load Current

• Low-Side r DS(on) Loss-Less Current Sensing

• Fixed Soft Start : 1.0ms

• Non-Sinking Pre-Biased Soft Start

• Powergood

• 700 kHz Switching Frequency

• Cycle-by-Cycle Over-Current Limit Control

• OCL/UVLO/TSD Protections

• Hiccup Timer for Overload Protection

• Adaptive Gate Drivers with Integrated Boost

PMOS Switch

• OCP Constant Due To Thermally Compensated

rDS(on) with 4000ppm/℃

• 16-Pin HTSSOP, 16-Pin VQFN

• Auto-Skip Eco-mode™　for High Efficiency at

Light Load

APPLICATIONS

• Point-of-Load Regulation in Low Power

Systems for Wide Range of Applications

– Digital TV Power Supply

– Networking Home Terminal

– Digital Set Top Box (STB)

– DVD Player/Recorder

– Gaming Consoles and Other

DESCRIPTION

The TPS542941 is a dual, adaptive on-time D–

CAP2™ mode synchronous buck converter. The TPS542941 enables system designers to complete

the suite of various end equipment’s power bus

regulators with a cost effective, low component count,

and low standby current solution. The main control

loops of the TPS542941 use the D-CAP2™ mode

control which provides a very fast transient response

with no external compensation components. The

adaptive on-time control supports seamless transition

between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™

allows the TPS542941 to maintain high efficiency

during lighter load conditions. The TPS542941 is able

to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-

CAP, and ultra-low ESR, ceramic capacitors. The

device provides convenient and efficient operation

with input voltages from 4.5V to 18V.

The TPS542941 is available in a 4.4mm × 5.0mm 16

pin TSSOP (PWP) package, and 4mm x 4mm 16-pin

VQFN (RSA) package specified for an ambient

temperature range from –40°C to 85°C.