Applications Note: AN_ SY7152
High Efficiency 1MHz, 2A Step Up Regulator Preliminary Specification
General Description
...
Applications Note: AN_ SY7152
High Efficiency 1MHz, 2A Step Up
Regulator Preliminary Specification
General Description
The SY7152 is a high efficiency boost
regulator targeted for general step-up applications.
Ordering Information
SY7152 □(□□)□ Temperature Code Package Code Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number Package type Note
SY7152ABC
SOT23-6
2A
Features
Wide input range: 3-8V bias input, 16Vout max 1MHz switching frequency Minimum on time: 100ns typical Minimum off time: 100ns typical Low RDS(ON): 150mΩ RoHS Compliant and Halogen Free Accurate Reference: 0.6VREF Compact package: SOT23-6
Applications
WLED Drivers Networking cards powered from PCI or PCI-
express slots
Typical Applications
Figure 1. Schematic Diagram
Figure 2. Efficiency vs Load Current
AN_SY7152 Rev.0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 1
Pinout (top view)
AN_SY7152
(SOT23-6)
Top Mark: LExyz (Device code: LE, x=year code, y=week code, z= lot number code)
Pin Name IN
GND LX FB
EN
Pin Number 5 2 1 3
4
Pin Description Input pin. Decouple this pin to GND pin with 1uF ceramic cap. Ground pin Inductor node. Connect an inductor between IN pin and LX pin. Feedback pin. Connect a resistor R1 between VOUT and FB, and a resistor R2 between FB and GND to program the output voltage: VOUT=0.6V*(R1/R2+1). Enable control. High to turn on the part. Don’t leave it floated.
NC 6 No connection.
Absolute Maximum Ratings (Note 1)
LX,...