SY8204 Datasheet PDF Download, Silergy





(PDF) SY8204 Datasheet Download

Part Number SY8204
Description Synchronous Step Down Regulator
Manufacture Silergy
Total Page 9 Pages
PDF Download Download SY8204 Datasheet PDF

Features: Application Notes: AN_SY8204 High Effici ency Fast Response, 4A, 30V Input Synch ronous Step Down Regulator General Des cription SY8204 develops a high effici ency synchronous stepdown DC-DC convert er capable of delivering 4A output curr ent. SY8204 operates over a wide input voltage range from 4.5V to 30V and inte grates main switch and synchronous swit ch with very low RDS(ON) to minimize th e conduction loss. SY8204 adopts the p roprietary instant PWM architecture to achieve fast transient responses for hi gh step down applications and high effi ciency at light loads. In addition, it operates at pseudo-constant frequency o f 500kHz under continous conduction mod e to minimize the size of inductor and capacitor. Ordering Information SY820 4 ( □ □□ □ ) Temperature Code Package Code Optional Spec Code Temp erature Range: -40°C to 85°C Orderin g Number Package type SY8204FCC SO8E Note -- Typical Applications Feature s • Low RDS(ON) for internal switches (top/bottom): 80/50 mΩ • 4.5-30V in.

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Application Notes: AN_SY8204
High Efficiency Fast Response, 4A, 30V Input
Synchronous Step Down Regulator
General Description
SY8204 develops a high efficiency synchronous step-
down DC-DC converter capable of delivering 4A output
current. SY8204 operates over a wide input voltage
range from 4.5V to 30V and integrates main switch and
synchronous switch with very low RDS(ON) to minimize
the conduction loss.
SY8204 adopts the proprietary instant PWM architecture
to achieve fast transient responses for high step down
applications and high efficiency at light loads. In
addition, it operates at pseudo-constant frequency of
500kHz under continous conduction mode to minimize
the size of inductor and capacitor.
Ordering Information
SY8204 (
□ □□ □
)
Temperature Code
Package Code
Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number Package type
SY8204FCC
SO8E
Note
--
Typical Applications
Features
Low RDS(ON) for internal switches (top/bottom):
80/50 m
4.5-30V input voltage range
Instant PWM architecture to achieve fast transient
responses
External softstart limits the inrush curre t
Pseudo-constant frequency: 500kHz at heavy loads
4A continuous, 5A peak load current capability
1.5% 0.6V reference
Output over current limit
Output short circuit p otection with current fold
back
Thermal shut own and auto recovery
RoHS Compliant and Halogen Free
Compact package: SO8E
Applications
LCD-TV
SetTop Box
Notebook
High power AP router
LCD Monitor
DVR/NVR
NAS
Efficiency vs. Load Current
90
85
80
75
70
65
60 VIN=12V, VOUT=1.8V
VIN=18V, VOUT=1.8V
55 VIN=30V, VOUT=1.8V
50
1
10
100
1000
10000
Load Current (mA)
Figure 1. Schematic Diagram
Figure 2. Efficiency vs. Load Current
AN_SY8204 Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only
1

                    
     






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