TPS7A20集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS7A20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TPS7A20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

• Low output voltage noise: 7μVRMS

– No noise-bypass capacitor required

• High PSRR: 95dB at 1kHz

• Very low IQ: 6.5μA

• Input voltage range: 1.6V to 6.0V

• Output voltage range: 0.8V to 5.5V

• Output voltage tolerance: ±1.5% (max)

• Very low dropout:

– 140mV (max) at 300mA (VOUT = 3.3V)

– 145mV (max) at 300mA (VOUT = 3.3V, DBV)

• Low inrush current

• Smart enable pulldown

• Stable with 1μF minimum ceramic output capacitor

• Packages:

– 1mm × 1mm X2SON (DQN)

– 0.616mm × 0.616mm DSBGA (YCK)

– 0.612mm × 0.612mm DSBGA (YCJ)

– 2.9mm × 2.8mm SOT23-5 (DBV)

2 Applications

• Smartphones and tablets

• IP network cameras

• Portable medical equipment

• Smart meters and field transmitters

• Motor drives

• Wearables

3 Description

The TPS7A20 is an ultra-small, low-dropout (LDO)

linear regulator that can source 300mA of output

current. The TPS7A20 is designed to provide low

noise, high PSRR, and excellent load and line

transient performance that can meet the requirements

of RF and other sensitive analog circuits. Using

innovative design techniques, the TPS7A20 offers an

ultra-low noise performance without the addition of a

noise bypass capacitor. The TPS7A20 also provides

the advantage of low quiescent current, which can be

ideal for battery-powered applications. With an input

voltage range of 1.6V to 6.0V and an output range of

0.8V to 5.5V, the TPS7A20 can be used for a wide

variety of applications. The device uses a precision

reference circuit to provide a maximum accuracy of

1.5% over load, line, and temperature variations.

The TPS7A20 features an internal soft-start to lower

the inrush current, thus minimizing the input voltage

drop during start up. The device is stable with

small ceramic capacitors, allowing for a small overall

solution size.

The TPS7A20 has a smart enable input circuit with an

internally controlled pulldown resistor that keeps the

LDO disabled even when the EN pin is left floating

and helps eliminate the external components used to

pulldown the EN pin.