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Silergy |
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, IN, EN ----------------------------------------------------------------------------------------------------------------------- 18V
All other pins-------------------------- ------------------------------------------------------------------------------------------ 3.6V
Power Dissipation, PD @ TA = 25°C SOT23-6 ----------------------------------------------------------------------------- 0.6W
Package Thermal Resistance (Note 2)
θ JA --------------------------------------------------------------------------------------------------------------- 161°C/W
θ JC --------------------------------------------------------------------------------------------------------------- 130°C/W
Junction Temperature Range ----------------------------------------------------------------------------------------------- 125°C
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------------------- 260°C
Storage Temperature Range ------------------------------------------------------------------------------------- -65°C to 150°C
Recommended Operating Conditions (Note 3)
Input Voltage Supply------------------------------------------------------------------------------------------------------ 3V to 8V
Junction Temperature Range ------------------------------------------------------------------------------------- -40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------------- -40°C to 85°C
AN_SY7152 Rev.0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 2
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