SY8031 Regulator Datasheet

SY8031 Datasheet, PDF, Equivalent


Part Number

SY8031

Description

1.2A Synchronous Step Down Regulator

Manufacture

Silergy

Total Page 3 Pages
Datasheet
Download SY8031 Datasheet


SY8031
SY8031
High Efficiency 2.25MHz, 1.2A
Synchronous Step Down Regulator
Preliminary Design Spec
General Description
The SY8031 is a high-efficiency 2.25MHz
synchronous step-down DC-DC converter capable of
delivering 1.2A output current. SY8031 operates over a
wide input voltage range from 2.5V to 5.5V and
integrates main switch and synchronous switch with
very low RDS(ON) to minimize the conduction loss.
Ordering Information
SY8031(□□)
Temerature Code
C: 0°C~85°C
Package Code:
AA:SOT23-5
Spec Code
Features
low Rds(on) for internal switches (top/bottom):
SY8031L: 300m/200 m, 0.6A
SY8031: 200m/150 m, 1.2A
continuous,2A peak
2.5-5.5V input voltage range
2.25MHz switching frequency
100uA quescient current
Internal softstart limits the inrush current
1.5% 0.6V reference
100% dropout operation
Compact package: SOT23-5
Applications
WiFi Card
Set Top Box
GPS
Toy
Typical Applications
VIN
EN
IN
L
CIN LX
GND
R1
FB
R2
VOUT
COUT
Figure 1. Schematic Diagram
Figure 2. Efficiency vs Load Current
SY8031Rev. # 0.3 Silergy Corp. Confidential- Prepared for Customer Use Only
1

SY8031
SY8031
Pinout
Pin Name
EN
GND
LX
IN
FB
SOT23-5
3
2
5
1
4
IN 1
5 LX
GND
2
EN 3
4 FB
SOT23-5 (SY8031)
Pin Description
Enable control. Pull high to turn on. Do not float.
Ground pin
Inductor pin. Connect this pin to the switching node of inductor
Input pin. Decouple this pin to GND pin with at least 1uF ceramic cap
Output Feedback Pin. Connect this pin to the center point of the output resistor
divider (as shown in Figure 1) to program the output voltage:
Vout=0.6*(1+R1/R2)
Absolute Maximum Ratings (Note 1)
Supply Input Voltage --------------------------------------------------------------------------------------- 6V
All Other Pins ----------------------------------------------------------------------------------------------- VIN + 0.6V
Power Dissipation, PD @ TA = 25°C SOT-23-5 ------------------------------------------------------- 0.4W
Package Thermal Resistance (Note 2)
SOT-23-5, θ JA --------------------------------------------------------------------- 250°C/W
SOT-23-5, θ JC --------------------------------------------------------------------- 130°C/W
Junction Temperature Range ------------------------------------------------------------------------------ 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------ 260°C
Storage Temperature Range ------------------------------------------------------------------------------- -65°C to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) -------------------------------------------------------------------------------- 2kV
MM (Machine Mode) --------------------------------------------------------------------------------------- 200V
-
Recommended Operating Conditions (Note 3)
EN, IN, FB pins --------------------------------------------------------------------------------------------- 2.5V to 5.5V
LX pin
-------------------------------------------------------------------------------------------- 2.5V to 6V
Junction Temperature Range ------------------------------------------------------------------------------ -40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------ -40°C to 85°C
SY8031Rev. # 0.3 Silergy Corp. Confidential- Prepared for Customer Use Only
2


Features SY8031 High Efficiency 2.25MHz, 1.2A Syn chronous Step Down Regulator Preliminar y Design Spec General Description The SY8031 is a high-efficiency 2.25MHz syn chronous step-down DC-DC converter capa ble of delivering 1.2A output current. SY8031 operates over a wide input volta ge range from 2.5V to 5.5V and integrat es main switch and synchronous switch w ith very low RDS(ON) to minimize the co nduction loss. Ordering Information SY8 031□(□□)□ Temerature Code C: 0 C~85°C Package Code: AA:SOT23-5 Spec Code Features • low Rds(on) for inte rnal switches (top/bottom): SY8031L: 30 0mΩ/200 mΩ, 0.6A SY8031: 200mΩ/15 0 mΩ, 1.2A continuous,2A peak • 2.5 -5.5V input voltage range • 2.25MHz s witching frequency • 100uA quescient current • Internal softstart limits t he inrush current • 1.5% 0.6V referen ce • 100% dropout operation • Compa ct package: SOT23-5 Applications • Wi Fi Card • Set Top Box • GPS • Toy Typical Applications VIN EN IN L CIN LX GND R1 FB R2 VOUT COUT Figure 1. Schematic Diagram Figur.
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