LDO regulators provide flexible outputs
ST’s LDH40 and LDQ40 voltage regulators deliver up to 200 mA and 250 mA, respectively, for use in industrial and automotive applications. The LDH40 regulator provides an adjustable output voltage from 1.2 V to 22 V. Variants of the LDQ40 regulator offer either an adjustable output from 1.2 V to 12 V or a fixed output at 1.8 V, 2.5 V, 3.3 V, or 5.0 V. Output voltage tolerance is ±0.5% at 25°C and ±1.5% over temperature.
These two low-dropout (LDO) regulators start up from an input as low as 3.3 V and operate with up to 40 V applied. To help conserve battery energy in always-on standby systems, the devices’ quiescent current is 2 µA at zero load and just 300 nA in logic-controlled shutdown mode. Automotive versions are AEC-Q100 Grade 1 qualified and operate over a temperature range of -40°C to +150°C.
The LDH40 automotive-grade regulator is in production now. Adjustable-output LDQ40 regulators, in industrial and automotive grades, are in production as well. Prices for both the LDH40 and LDQ40 automotive-grade parts start at $0.47 each in lots of 1000 units. Fixed-output LDQ40 automotive components will be available in Q2, with industrial parts to follow in Q3.
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