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Application Note: SY7088
2.3V Minimum Input and 5.5V Maximum Output 3A Peak Current Synchronous Boost...
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Application Note: SY7088
2.3V Minimum Input and 5.5V Maximum Output 3A Peak Current Synchronous Boost with Output Disconnect
Preliminary Specification
General Description
SY7088 is a high efficiency synchronous boost
regulator that converts up to 5.5V output voltage. It adopts NMOS for the main switch and PMOS for the synchronous switch. It can disconnect the output from input during the shutdown mode.
Ordering Information
SY7088 □(□□)□ Tempera ture Code Packa ge Code Optiona l Spec Code
Ordering Number Package type
SY7088DGC
DFN2x3-8
Note ----
Features
2.3-5.0V input voltage range Adjustable output voltage from 2.5V to 5.5V Pseudo-constant frequency: 1MHz 3A peak current limit Input under voltage lockout Load disconnect during shutdown Output over voltage protection Low RDS(ON) (main switch/synchronous switch)
at 5.0V output: 70/100mohm Compact package: DFN2x3-8
Applications
All Single Cell Li or Dual Cell Battery Operated Products as MP-3 Player, PDAs, and Other Portable Equipment.
Typical Applications
Figure 1. Schematic Diagram
Figure 2. Efficiency Figure
AN_SY7088 Rev.0.1A
1
Pinout (top view)
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SY7088
(DFN2x3-8) Top mark: VTxyz (Device code: VT, x=year code, y=week code, z= lot number code)
Name LX EN
SGND
FB
IN
OUT PGND
DFN2x3-8 1, 2 3 4
5
6
7, 8 9
Description Inductor node. Connect an inductor between IN pin and LX pin. Enable pin. Internal integrated with 1Mohm pull down resistor. Signal ground p...