TPS737集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS737属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的TPS737稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

1 Features

• Stable with 1-μF or larger ceramic output capacitor

• Input voltage range: 2.2 V to 5.5 V

• Ultra-low dropout voltage

– Legacy silicon: 130 mV typical at 1 A

– New silicon, M3 suffix: 122 mV typical at 1 A

• Excellent load transient response—even with only

1-μF output capacitor

• NMOS topology delivers low reverse leakage

current

• Initial accuracy: 1%

• Overall accuracy over line, load, and temperature

– Legacy silicon: 3%

– New silicon, M3 suffix: 1.5%

• Less than 20 nA typical IQ in shutdown mode

• Thermal shutdown and current limit for fault

protection

• Available in multiple output voltage versions:

– Adjustable output: 1.20 V to 5.5 V

– Custom outputs available using factory

package-level programming

2 Applications

• Point-of-load regulation for DSPs, FPGAs, ASICs,

and microprocessors

• Post-regulation for switching supplies

• Portable and battery-powered equipment

3 Description

The TPS737 linear low-dropout (LDO) voltage

regulator uses an NMOS pass transistor in a voltagefollower

configuration. This topology is relatively

insensitive to the output capacitor value and ESR,

allowing for a wide variety of load configurations. Load

transient response is excellent, even with a small 1-μF

ceramic output capacitor. The NMOS topology also

allows for very low dropout.

The TPS737 uses an advanced BiCMOS process to

yield high precision while delivering very low dropout

voltages and low ground pin current. Part numbers

with the M3 suffix use an updated design on the

latest TI process technology. Current consumption,

when not enabled, is less than 20 nA and is designed

for portable applications. This device is protected by

thermal shutdown and foldback current limit.

For applications that require higher output voltage

accuracy, consider TI's TPS7A37 1% overall

accuracy, 1-A low-dropout voltage regulator.