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SYVM78A

Silergy
Part Number SYVM78A
Manufacturer Silergy
Description Asynchronous Step Down Regulator
Published May 25, 2020
Detailed Description Application Note: SYVM78A High Efficiency, 1.5MHz, 55V Input, 0.8A Asynchronous Step Down Regulator General Descriptio...
Datasheet PDF File SYVM78A PDF File

SYVM78A
SYVM78A

Overview
Application Note: SYVM78A High Efficiency, 1.
5MHz, 55V Input, 0.
8A Asynchronous Step Down Regulator General Description The SYVM78A develops a high efficiency asynchronous step down DC/DC regulator, which is capable of delivering 0.
8A output current.
The IC adopts current mode adaptive constant off time control.
The SYVM78A operates over a wide input voltage range from 4.
5V to 55V and integrates main switch with very low RDS(ON) to minimize the conduction loss.
Low output voltage ripple, small external inductor and capacitor sizes are achieved with 1.
5MHz switching frequency.
Ordering Information SYVM78 □(□□)□ Temperature Code Package Code Optional Spec Code Ordering Number SYVM78AABC Package type SOT23-6 Note -- Features  Low RDS(ON) for Internal N-channel Power FET: 700mΩ  4.
5-55V Input Voltage Range  0.
8A Output Current Capability  1.
5MHz Pseudo Constant Switching Frequency  Internal Soft-start Limits the Inrush Current  Hic-cup Mode Output Short Circuit Protection  EN ON/OFF Control with Accurate Threshold  Cycle by Cycle Peak Current Limit  Meet 0.
1% Output Voltage Ripple Request in Power Meter Application  0.
6V±1 % Reference Voltage  SOT23-6 Package Applications  Non-Isolated Telecommunication Buck Regulator  Secondary High Voltage Post Regulator  Automotive Systems 21 Efficiency (%) Typical Applications CBS VIN CIN 5 IN BS 6 LX L1 D1 ON/ OFF 4 EN FB 3 GND VOUT R1 C4 (opt.
) COUT R2 Figure 1.
Schematic Diagram Efficiency vs Output Current 100 90 80 70 60 50 40 0.
001 Vin=24V,Vout=12V Vin=48V,Vout=12V 0.
01 0.
1 Output Current (A) Figure 2.
Efficiency AN_SYVM78A Rev.
0.
9 © 2019 Silergy Corp.
Silergy Corp.
Confidential- Prepared for Customer Use Only 1 All Rights Reserved.
Pinout (top view) SYVM78A BS 1 6 LX GND 2 5 IN FB 3 4 EN (SOT23-6) Top Mark: yFxyz (Device code: yF, x=year code, y=week code, z= lot number code) Pin Name BS GND FB EN IN LX Pin Number 1 2 3 4 5 6 Pin Description Boot-strap pin.
Supply...


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