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MAX1973

Features: Tiny Circuit Footprint of 0.19in2Ultra-Low Circuit Height of 1.8mm4.7µF Ceramic Input and Output Capacitors2.6V to 5.5V Input Voltage1A Output Current1% AccurateBuilt-In ±4% Logic-Controlled Voltage Margining (MAX1973) Preset 1V, 1.5V, 1.8V, 2.5V, or 0.75V to VIN Adjustable OutputF...

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SeekIC No. : 004409490 Detail

MAX1973: Features: Tiny Circuit Footprint of 0.19in2Ultra-Low Circuit Height of 1.8mm4.7µF Ceramic Input and Output Capacitors2.6V to 5.5V Input Voltage1A Output Current1% AccurateBuilt-In ±4% Logic-Co...

MAX1973 Data Sheet

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Part Number:
MAX1973
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

 Tiny Circuit Footprint of 0.19in2
 Ultra-Low Circuit Height of 1.8mm
 4.7µF Ceramic Input and Output Capacitors
 2.6V to 5.5V Input Voltage
 1A Output Current
 1% Accurate
 Built-In ±4% Logic-Controlled Voltage Margining (MAX1973)
Preset 1V, 1.5V, 1.8V, 2.5V, or 0.75V to VIN Adjustable Output
 Fixed-Frequency PWM Current-Mode Operation
 1.4MHz Switching Frequency, Operate Outside DSL Band
 100% Duty-Cycle Dropout Capability
 Small External Components


Application

Network Equipment
Cellular Base Stations
DSL and Wireless Modems/Routers
Optical Modules
Central-Office DSL and Telecom
DSP/ASIC Core and IO supplies


Pinout

Connection Diagram


Specifications

IN, POK, CTL1, CTL2, FBSEL, ON to GND ...................-0.3V to +6V
COMP, FB, SS to GND ...................................-0.3V to (VIN + 0.3V)
PGND to GND .........................................................-0.3V to +0.3V
LX Current (Note 1) ...............................................-2.4A to +2.4A
Continuous Power Dissipation (TA = +70°C)
    10-Pin µMAX (derate 5.6mW/°C above +70°C) .......... 444mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C


Description

The MAX1973/MAX1974 are constant-frequency 1.4MHz pulse-width-modulated (PWM) current-mode step-down regulators. The output voltage can be set as low as 0.75V using an external voltage-divider, or it can be set to preset outputs of 1V, 1.5V (MAX1974), 1.8V, or 2.5V (MAX1973) without requiring external resistors.

The MAX1973 also includes a voltage-margining feature that offsets the output voltage up or down 4% to facilitate board-level production testing. A fixed 1.4MHz operating frequency ensures operation outside the DSL frequency band, provides fast transient response, and allows the use of small external components. Only 4.7µF input and output ceramic capacitors are needed for 1A applications. Forced PWM operation ensures a constant switching frequency over all load conditions of MAX1973/MAX1974.

Output voltage accuracy of MAX1973/MAX1974 is ±1% over load, line, and temperature operating ranges. The MAX1973 features voltage margining; the MAX1974 provides a POK output to indicate when the output has reached 90% of its nominal regulation voltage. Both devices are available in small 10-pin µMAX packages.




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