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SY8088AAC PDF даташит

Спецификация SY8088AAC изготовлена ​​​​«Silergy» и имеет функцию, называемую «1A Synchronous Step Down Regulator».

Детали детали

Номер произв SY8088AAC
Описание 1A Synchronous Step Down Regulator
Производители Silergy
логотип Silergy логотип 

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SY8088AAC Даташит, Описание, Даташиты
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









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SY8088AAC Даташит, Описание, Даташиты
Pinout (Top View)
AN_SY8088
(SOT23-5)
Top Mark: LDxyz (device code: LD, x=year code, y=week code, z= lot number code)
Pin Name
EN
GND
LX
IN
FB
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 4.7uF 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 Voltage---------------------------------------------------------------------------------------------------- VIN + 0.6V
Power Dissipation, PD @ TA = 25°C, SOT23-5--------------------------------------------------------------------------- 0.6W
Package Thermal Resistance (Note 2)
θ JA -------------------------------------------------------------------------------------------------------------- 170°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)
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_SY8088 Rev. 0.1
Silergy Corp. Confidential- Prepared for Customer Use Only
2









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SY8088AAC Даташит, Описание, Даташиты
AN_SY8088
Electrical Characteristics
(VIN = 5V, VOUT = 2.5V, L = 2.2uH, COUT = 10uF, TA = 25°C, unless otherwise specified)
Parameter
Input Voltage Range
Quiescent Current
Shutdown Current
Feedback Reference Voltage
PFET RON
NFET RON
PFET Current Limit
EN rising threshold
EN falling threshold
Input UVLO threshold
UVLO hysteresis
Oscillator Frequency
Min ON Time
Max Duty Cycle
Soft Start Time
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Symbol
VIN
IQ
ISHDN
VREF
RDS(ON),P
RDS(ON),N
ILIM
VENH
VENL
VUVLO
VHYS
FOSC
TSS
TSD
THYS
Test Conditions
IOUT=0, VFB=VREF 105%
EN=0
Min Typ Max Unit
2.5 5.5 V
40 µA
0.1 1 µA
0.588 0.6 0.612 V
260 m
170
1.3
m
A
1.5 V
0.4 V
2.5 V
0.1 V
1.5 MHz
80 ns
100 %
1 ms
160 °C
15 °C
Note 1: Stresses beyond the “Absolute Maximum Ratings” may cause permanent damage to the device. These are
for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for
extended periods may remain possibility to affect device reliability.
Note 2: θ JA is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity
test board of JEDEC 51-3 thermal measurement standard. Exposed Paddle of DFN package is the case position for
θ JC measurement.
Note 3: The device is not guaranteed to function outside its operating conditions.
AN_SY8088 Rev. 0.1
Silergy Corp. Confidential- Prepared for Customer Use Only
3










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Номер в каталогеОписаниеПроизводители
SY8088AAC1A Synchronous Step Down RegulatorSilergy
Silergy

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