LM2937-3.3 - 400mA and 500mA Voltage Regulator

LM2937-3.3是TI德州仪器公司的一款单通道LDO产品，LM2937-3.3是400mA and 500mA Voltage Regulator，本站介绍了LM2937-3.3的封装应用图解、特点和优点、功能等，并给出了与LM2937-3.3相关的TI元器件型号供参考。

LM2937-3.3 - 400mA and 500mA Voltage Regulator - 单通道LDO - 线性稳压器(LDO) - 德州仪器

产品特性

Operating Input Voltage Range : 4.75 V to 26 V
Fully Specified for Operation Over −40°C to 125°C
Output Current in Excess of 500 mA (400 mA for SOT-223 package)
Output Trimmed for 5% Tolerance Under All Operating Conditions
Wide Output Capacitor ESR Range, 0.01 Ω up to 5 Ω
Internal Short Circuit and Thermal Overload Protection
Reverse Battery Input Protection
60-V Input Transient Protection

产品应用

Automotive
Industrial Control
Point-of-Load Regulation

Simplified Schematic

* Required if the regulator is located more than 3 inches from the power supply filter capacitors.
** Required for stability. COUT must be at least 10 µF (over full expected operating temperature range) and located as close as possible to the regulator. The equivalent series resistance, ESR, of this capacitor may be as high as 3 Ω.

产品说明

The LM2937-2.5 and LM2937-3.3 are positive voltage regulators capable of supplying up to 500 mA of load current. Both regulators are ideal for converting a common 5-V logic supply, or higher input supply voltage, to the lower 2.5-V and 3.3-V supplies to power very-large-scale integrations (VLSI) ASICs and microcontrollers. Special circuitry has been incorporated to minimize the quiescent current to typically only 10 mA with a full 500-mA load current when the input to output voltage differential is greater than 5 V.

The LM2937 requires an output bypass capacitor for stability. As with most regulators utilizing a PNP pass transistor, the ESR of this capacitor remains a critical design parameter, but the LM2937-2.5 and LM2937-3.3 include special compensation circuitry that relaxes ESR requirements. The LM2937 is stable for all ESR ratings less than 5 Ω. This allows the use of low ESR chip capacitors.

The regulators are also suited for automotive applications, with built in protection from reverse battery connections, two-battery jumps and up to +60 V/−50 V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM2937	TO-220 (3)	14.986 mm x 10.66 mm
	SOT (4)	6.50 mm x 3.5 mm
	TO-263 (3)	0.18 mm x 8.41 mm

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