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SY8008B Datasheet Preview

SY8008B Datasheet

Synchronous Step Down Regulator

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Applications Note: AN_SY8008A/B/C
High Efficiency 1.5MHz, 0.6A/1A/1.2A
Synchronous Step Down Regulator
General Description
The SY8008A, SY8008B and SY8008C are high-
efficiency 1.5MHz synchronous step-down DC-DC
regulator ICs capable of delivering up to 1.2A output
currents. The SY8008 family operate over a wide input
voltage range from 2.5V to 5.5V and integrate main
switch and synchronous switch with very low RDS(ON)
to minimize the conduction loss.
Low output voltage ripple and small external inductor
and capacitor sizes are achieved with 1.5MHz
switching frequency. This along with small SOT-
23/TSOT-23 footprint provides small PCB area
application.
Ordering Information
SY8008(□□)
Temperature Code
Package Code
Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number Package type Note
SY8008AAAC
SOT23-5
0.6A
SY8008BAAC
SOT23-5
1A
SY8008CAAC
SOT23-5
1.2A
SY8008AACC
TSOT23-5 0.6A
SY8008BACC
TSOT23-5
1A
Features
Low RDS(ON) for internal switches (top/bottom)
ο SY8008A: 300m Ω /250m Ω, 0.6A
ο SY8008B: 250m Ω /200m Ω, 1A
ο SY8008C: 200m Ω /150m Ω, 1.2A
2.5-5.5V input voltage range
1.5MHz switching frequency minimizes the
external components
Internal softstart limits the inrush current
100% dropout operation
RoHS Compliant and Halogen Free
Compact package: SOT23-5/ TSOT23-5 pin
Applications
Portable Navigation Device
Smart phone
USB Dongle
Set Top Box
Media Player
Typical Applications
VIN EN L
VOUT
IN LX
C1(opt.)
CIN
R1
COUT
FB
GND
R2
Figure 1. Schematic Diagram
Figure 2. Efficiency vs Load Current (SY8008B)
AN_SY8008 Rev. 1.0B Silergy Corp. Confidential- Prepared for Customer Use Only 1




Silergy

SY8008B Datasheet Preview

SY8008B Datasheet

Synchronous Step Down Regulator

No Preview Available !

Pinout (top view)
AN_SY8008A/B/C
Pin Name
EN
GND
LX
IN
FB
(SOT23-5, TSOT23-5)
Part Number
Package type
Top Mark
SY8008AAAC
SOT23-5
AAxyz
SY8008BAAC
SOT23-5
ABxyz
SY8008CAAC
SOT23-5
ACxyz
SY8008AACC
TSOT23-5
BIxyz
SY8008BACC
TSOT23-5
BGxyz
Note① : x=year code, y=week code, z= lot number code.
Pin Number
1
2
3
4
5
Pin Description
Enable control. Pull high to turn on. Do not float.
Ground pin.
Inductor pin. Connect this pin to the switching node of the inductor.
Input pin. Decouple this pin to the GND pin with at least 1uF ceramic
capacitor.
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).Add optional C1 (10pF~47pF) to speed up the transient
response.
Absolute Maximum Ratings (Note 1)
Supply Input Voltage ---------------------------------------------------------------------------------------------------------- 6.0V
Enable, FB, LX Voltage---------------------------------------------------------------------------------------0.3V to VIN + 0.6V
Power Dissipation, PD @ TA = 25°C, SOT23-5, TSOT23-5 ------------------------------------------------------------- 0.6W
Package Thermal Resistance (Note 2)
SOT23-5, TSOT23-5, θ JA ------------------------------------------------------------------------------------- 170°C/W
SOT23-5, TSOT23-5, 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
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ---------------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
Supply Input Voltage ------------------------------------------------------------------------------------------------- 2.5V to 5.5V
Junction Temperature Range ------------------------------------------------------------------------------------ -40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------------- -40°C to 85°C
AN_SY8008 Rev. 1.0B Silergy Corp. Confidential- Prepared for Customer Use Only 2


Part Number SY8008B
Description Synchronous Step Down Regulator
Maker Silergy
Total Page 9 Pages
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