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  • L7987

L7987

16-Pin L7987 DC DC Voltage Regulator SWITCHING REGULATOR 1 Outputs 250kHz~1.5MHz Tube 16-TSSOP (0.173, 4.40mm Width) Exposed Pad


  • Manufacturer: STMicroelectronics
  • Origchip NO: 761-L7987
  • Package: 16-TSSOP (0.173, 4.40mm Width) Exposed Pad
  • Datasheet: PDF
  • Stock: 581
  • Description: 16-Pin L7987 DC DC Voltage Regulator SWITCHING REGULATOR 1 Outputs 250kHz~1.5MHz Tube 16-TSSOP (0.173, 4.40mm Width) Exposed Pad (Kg)

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Details

Tags

Parameters
Factory Lead Time 14 Weeks
Lifecycle Status ACTIVE (Last Updated: 7 months ago)
Mount Surface Mount
Mounting Type Surface Mount
Package / Case 16-TSSOP (0.173, 4.40mm Width) Exposed Pad
Number of Pins 16
Weight 62.709145mg
Operating Temperature -40°C~150°C TJ
Packaging Tube
Part Status Active
Moisture Sensitivity Level (MSL) 3 (168 Hours)
ECCN Code EAR99
Base Part Number L7987
Function Step-Down
Number of Outputs 1
Output Voltage 61V
Output Type Adjustable
Max Output Current 3A
Operating Supply Voltage 61V
Max Supply Voltage 61V
Min Supply Voltage 4.5V
Analog IC - Other Type SWITCHING REGULATOR
Operating Supply Current 2.5mA
Output Configuration Positive
Max Output Voltage 61V
Voltage - Output (Min/Fixed) 0.8V
Topology Buck
Frequency - Switching 250kHz~1.5MHz
Synchronous Rectifier No
Min Output Voltage 800mV
Max Duty Cycle 100 %
Max Junction Temperature (Tj) 150°C
Height 1.2mm
RoHS Status ROHS3 Compliant

L7987 Description


The L7987 device is a step-down monolithic switching regulator able to deliver up to 3 A DC. The output voltage adjustability ranges from 0.8 V to VIN. The wide input voltage range and the 100% duty cycle capability meet the fail safe specifications for industrial systems. The embedded switchover feature on the VBIAS pin maximizes the efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current accordingly with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing with digital frequency foldback implements an effective constant current protection over the different application conditions. The peak current foldback decreases the stress of the power components in heavy short-circuit condition. The PGOOD open collector output can also implement output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise in low noise applications like sensors with A/D conversion.



L7987 Features


  • 3 A DC output current

  • 4.5 V to 61 V operating input voltage

  • RDS,ON = 250 mΩ typ.

  • Adjustable fSW (250 kHz - 1.5 MHz)

  • Low IQ-SHD (11 μA typ. from VIN)

  • Low IQ (1 mA typ. - VIN 24 V - VOUT 3.3 V)

  • Output voltage adjustable from 0.8 V to VIN

  • Synchronization

  • Adjustable soft-start time

  • Adjustable current limitation

  • Low dropout operation (12 μs max.)

  • VBIAS improves efficiency at light load

  • PGOOD open collector output

  • Output voltage sequencing

  • Digital frequency foldback in short-circuit

  • Peak current foldback in short-circuit

  • Auto-recovery thermal shutdown



L7987 Applications


  • Designed for 24 V bus

  • Fail safe tolerant system

  • Programmable logic controllers (PLCs)

  • 5G Communication

  • Electrification of automobile

  • Industrial 4.0