MAX851ISA+

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Analog Devices Inc./Maxim Integrated

LOW-NOISE, REGULATED, NEGATIVE CHARGE PUMP POWER SUPPLIES FOR GAASFET BIAS

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MAX851ISA+

Active

Analog Devices Inc./Maxim Integrated

LOW-NOISE, REGULATED, NEGATIVE CHARGE PUMP POWER SUPPLIES FOR GAASFET BIAS

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Description Specifications Series Pricing CAD Documents

Description

General part information

MAX851 Series

The MAX850-MAX853 low-noise, inverting, charge-pump power supplies are ideal for biasing GaAsFETs in cellular telephone transmitter amplifiers.The MAX850-MAX852 offer both preset (-4.1V) and adjustable (-0.5V to -9.0V) output voltages. The MAX853 uses an external positive control voltage to set the negative output voltage. Input voltage range for all four devices is 4.5V to 10V. Output current is 5mA.An internal linear regulator reduces the output voltage ripple to 2mVP-P. With a well-filtered control voltage (VCTRL), the MAX853 achieves typical output ripple of less than 1mVP-P. Supply current is 3mA max, and shutdown current is less than 1µA max over temperature (5µA max for MAX851).ApplicationsCell PhonesContinuously Adjustable GaAsFET BiasLCD-Bias Contrast ControlNegative Regulated Power SuppliesPersonal Communicators, PDAsWireless Data Loggers

Technical Specifications

Parameters and characteristics for this part

Specification	MAX851ISA+

Current - Output	5 mA
Frequency - Switching	100 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-25 °C
Output Configuration	Negative
Output Type	Adjustable (Fixed)
Package Length	0.154 in
Package Name	8-SOIC
Package Width	3.9 mm
Synchronous Rectifier	No
Topology	Charge Pump
Voltage - Input (Max)	10 V
Voltage - Input (Min)	4.5 V
Voltage - Output (Max)	-9 V
Voltage - Output (Min/Fixed)	-1.28 V

MAX851 Series

Low-Noise, Regulated, Negative Charge Pump Power Supplies for GaAsFET Bias

Part	Operating Temperature (Min)	Operating Temperature (Max)	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Package Length	Package Name	Package Width	Applications	Number of Outputs	Mounting Type	Voltage - Output	Supplied Contents	Contents	Utilized IC / Part	Type	Function	Voltage - Output (Min/Fixed)	Synchronous Rectifier	Output Type	Frequency - Switching	Current - Output	Output Configuration	Voltage - Input (Max)	Topology	Voltage - Input (Min)	Voltage - Output (Max)
Analog Devices Inc./Maxim Integrated MAX851ESA	-40 °C	85 °C	4.5 V	10 V	0.154 in	8-SOIC	3.9 mm	Cellular Telephone Transmitter Charge Pump	1	Surface Mount	-4.1 V
Analog Devices Inc./Maxim Integrated MAX8515EVKIT												Board(s)	Board	MAX8515	Power Management	Shunt Regulator
Analog Devices Inc./Maxim Integrated MAX851ISA+	-25 °C	85 °C			0.154 in	8-SOIC	3.9 mm		1	Surface Mount						Step-Down	-1.28 V	No	Adjustable (Fixed)	100 kHz	5 mA	Negative	10 V	Charge Pump	4.5 V	-9 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Package Drawing - Small-Outline IC, Narrow (0.15in)

MAX851ISA+ | Datasheet

Datasheet