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SY8088AAC PDF 데이터시트 ( Data , Function )

부품번호 SY8088AAC 기능
기능 1A Synchronous Step Down Regulator
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SY8088AAC 데이터시트, 핀배열, 회로
Application Notes: AN_SY8088
High Efficiency 1.5MHz, 1A
Synchronous Step Down Regulator
Preliminary Specification
General Description
SY8088 is a high efficiency 1.5MHz synchronous step
down DC/DC regulator IC capable of delivering up to
1A output current. It can 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.
Ordering Information
SY8088 (□□)
Temperature Code
Package Code
Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number Package Type Note
SY8088AAC
SOT23-5
1A
Features
Low RDS(ON) for internal switches (top/bottom)
260m/170m
2.5~5.5V input voltage range
40µA typical quiescent current
High light load efficiency
High switching frequency 1.5MHz minimizes the
external components
Internal soft-start limits the inrush current
100% dropout operation
RoHS Compliant and Halogen Free
Compact package: SOT23-5
Applications
Portable Navigation Device
Set Top Box
USB Dongle
Media Player
Smart phone
Typical Application
Figure1. Schematic Diagram
95
90
85
80
75
70
1
Efficiency vs. Load Current
VIN=3.3V,VOUT=1.8V
VIN=4.2V,VOUT=1.8V
VIN=5.0V,VOUT=1.8V
10 100
Load Current (mA)
1000
Figure2. Efficiency
AN_SY8088 Rev. 0.1
Silergy Corp. Confidential- Prepared for Customer Use Only
1




SY8088AAC pdf, 반도체, 판매, 대치품
Typical Performance Characteristics
Efficiency vs. Load Current
95
90
85
80
75 VIN=3.3V,VOUT=1.2V
VIN=4.2V,VOUT=1.2V
70 VIN=5.0V,VOUT=1.2V
65
1
100
10 100
Load Current (mA)
Efficiency vs. Load Current
1000
95
90
85
VIN=4.2V,VOUT=3.3V
80
VIN=5V,VOUT=3.3V
75
70
1
10 100
Load Current (mA)
Output Ripple
(VIN=5.0V, VOUT=1.8V, ILOAD=0.2A)
∆Vout 20mV/div
1000
LX 2.0V/div
AN_SY8088
Efficiency vs. Load Current
95
90
85
80
VIN=3.3V,VOUT=1.8V
VIN=4.2V,VOUT=1.8V
75
VIN=5.0V,VOUT=1.8V
70 1
10 100
Load Current (mA)
Output Ripple
(VIN=5.0V, VOUT=1.8V, ILOAD=0A)
1000
∆Vout 20mV/div
LX 2.0V/div
IL 0.5A/div
Time (400ns/div)
∆Vout
Output Ripple
(VIN=5.0V, VOUT=1.8V, ILOAD=1A)
20mV/div
LX 2.0V/div
IL 0.5A/div
IL 1.0A/div
Time (400ns/div)
Time (400ns/div)
AN_SY8088 Rev. 0.1
Silergy Corp. Confidential- Prepared for Customer Use Only
4

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SY8088AAC 전자부품, 판매, 대치품
AN_SY8088
4) The components R1 and R2, and the trace
connecting to the FB pin must NOT be adjacent to the
LX net on the PCB layout to avoid the noise problem.
5) If the system chip interfacing with the EN pin has a
high impedance state at shutdown mode and the IN pin
is connected directly to a power source such as a LiIon
battery, it is desirable to add a pull down 1Mohm
resistor between the EN and GND pins to prevent the
noise from falsely turning on the regulator at shutdown
mode.
AN_SY8088 Rev. 0.1
Silergy Corp. Confidential- Prepared for Customer Use Only
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부품번호상세설명 및 기능제조사
SY8088AAC

1A Synchronous Step Down Regulator

Silergy
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