Details, datasheet, quote on part number: MC33761SNT1-28
CategoryPower Management => Regulators
DescriptionUltra Low-noise Low Dropout Voltage Regulator With 1v On/off Control
CompanyON Semiconductor
DatasheetDownload MC33761SNT1-28 datasheet
Cross ref.Similar parts: REG102, LP2981-28, LP2981A-28, LP2985-28, LP2985-N, LP2985A-28, LP3985, LP3990, LP5907, LP5951
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Features, Applications

Ultra Low-Noise Low Dropout Voltage Regulator with 1V ON/OFF Control

The is an Low DropOut (LDO) regulator featuring excellent noise performances. Thanks to its innovative concept, the circuit reaches an incredible 40µVRMS noise level without an external bypass capacitor. Housed in a small SOT­23 5 leads­like package, it represents the ideal designer's choice when space and noise are at premium. The absence of external bandgap capacitor unleashes the response time to a wake­up signal and makes it stay within 40µs (in repetitive mode), pushing the as a natural candidate in portable applications. The MC33761 also hosts a novel architecture which prevents excessive undershoots when the regulator is the seat of fast transient bursts, as in any bursting systems. Finally, with a static line regulation better than ­75dB, it naturally shields the downstream electronics against choppy lines.

typical, Iout 60mA, Co=1µF Fast response time from OFF to ON: 40µs typical a 200Hz repetition rate Ready for 1V platforms: ON with a 900mVhigh level Nominal output current of 80mA with a 100mA peak capability Typical dropout @ 80mA Ripple rejection: 1kHz 1.5% output precision @ 25°C Thermal shutdown Vout available from to 5.0V


Noise sensitive circuits: VCOs RF stages etc. Bursting systems (TDMA phones) All battery operated devices

ON/ OFF 3 4 On/Off Band Gap Reference Vout 1 Thermal Shutdown Vin
5 *Current Limit *Antisaturation Protection *Load Transient Improvement

This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice.

See detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet.

Pin Name Vin GND ON/OFF NC Vout Function Powers the IC The IC's ground Shuts or wakes­up the IC None Delivers the output voltage A 900mV level on this pin is sufficient to start the IC. A 150mV shuts it down. It makes no arm to connect the pin to a known potential, like in a pin­to­pin replacement case. This pin requires a 1µF output capacitor to be stable. Description A positive voltage to 12V can be applied upon this pin.

Value Rating Power Supply Voltage ESD Capability, HBM Model ESD Capability, Machine Model Maximum Power Dissipation NW Suffix, Plastic Package Thermal Resistance Junction­to­Air Operating Ambient Temperature Maximum Junction Temperature (1) Maximum Operating Junction Temperature (2) Storage Temperature Range (1) Internally Limited by Shutdown. (2) Specifications are guaranteed below this value. Pin # 1 All Pins All Pins PD RqJ­A TA TJmax TJ Tstg Symbol Vin Min Max 1 200 Internally Limited to +150 Unit V W °C/W °C

(For Typical Values = 25°C, for Min/Max values to +85°C, Max = 125°C unless otherwise noted) Characteristics Pin # Symbol Min Typ Max Unit

Input Voltage Range ON/OFF Input Resistance (all versions) ON/OFF Control Voltages (3) Logic Zero, OFF State, 50 mA Logic One, ON State, mA 3 VON/OFF RON/OFF VON/OFF Vin kW mV

Current Consumption in OFF State (all versions) OFF Mode Current: Vin = Vout = 0, VOFF 150 mV Current Consumption in ON State (all versions) ON Mode Current: Vin = Vout = 0, VON 3.5 V Current Consumption in ON State (all versions), ON Mode Saturation Current: Vin = Vout V, No Output Load Current Limit Vin = Voutnom 1 V, Output is brought to Voutnom 0.3 V (all versions) IQOFF IQON IQSAT IMAX

(3) Voltage Slope should be Greater than 2 mV/ms

(For Typical Values = 25°C, for Min/Max values to +85°C, Max = 125°C unless otherwise noted) Characteristics Pin # Symbol Min Typ Max Unit

Vout Vin mA < Iout 3.6 V Other Voltages to 5V Available in 50mV Increments Steps Vout 1V < Vin 1mA < Iout 3.6 V Other Voltages to 5V Available in 50mV Increments Steps Vout

Line Regulation (all versions) Vout Vin 12 V, Iout 80 mA Load Regulation (all versions) Vin = Vout 1 V, Cout = 1 mF, Iout 80 mA Dropout Voltage (all versions) (3) Iout 30 mA Iout 60 mA Iout 5/1 5 Regline Regload mV 5 Vin­Vout

Ripple Rejection (all versions) Vin = Vout kHz 100 mVpp Sinusoidal Signal Output Noise Density @ 1 kHz RMS Output Noise Voltage (all versions) Cout = 1 mF, Iout = 50 mA, to 1 MHz Output Rise Time (all versions) Cout = 1 mF, Iout = 50 mA, 10% of Rising ON Signal 90% of Nominal Vout Noise trise Ripple dB nV/ Hz

Thermal Shutdown (all versions) (3) Vout is brought to Vout 125 °C


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