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Down Regulator. SY8105 Datasheet

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Down Regulator. SY8105 Datasheet






SY8105 Regulator. Datasheet pdf. Equivalent




SY8105 Regulator. Datasheet pdf. Equivalent





Part

SY8105

Description

Synchronous Step Down Regulator



Feature


Applications Note:AN_SY8105 High Efficie ncy, 500kHz, 5A, 18V Input Synchronous Step Down Regulator General Descriptio n The SY8105 is a high efficiency 500 kHz synchronous step-down DC-DC convert er capable of delivering 5.0A current. The SY8105 operates over a wide input v oltage range from 4.5V to 18V and integ rates main switch and synchronous switc h with very low RD.
Manufacture

Silergy

Datasheet
Download SY8105 Datasheet


Silergy SY8105

SY8105; S(ON) to minimize the conduction loss. Low output voltage ripple and small ext ernal inductor and capacitor sizes are achieved with 500 kHz switching frequen cy. It adopts the instant PWM architect ure to achieve fast transient responses for high step down applications Order ing Information SY8105 □(□□)□ Temperature Code Package Code Optional Spec Code Ordering Number.


Silergy SY8105

Package type Note SY8105ADC TSOT23-6 -- Features • low RDS(ON) for inter nal switches (top/bottom): 40mΩ/26m • 4.5-18V input voltage range • 5 .0A output current capability • 500 k Hz switching frequency • Instant PWM architecture to achieve fast transient responses. • Internal softstart limit s the inrush current • Cycle-by-cycle peak current limitation • 1.5% 0.6V.


Silergy SY8105

reference • TSOT23-6 package Applicat ions • Set Top Box • Portable TV Access Point Router • DSL Modem • LCD TV Typical Applications Figure 1. Schematic Diagram Efficiency (%) 100 90 80 70 60 50 40 30 20 10 0 0.001 Ef ficiency vs. Load Current VIN=5V,VOUT= 3.3V VIN=12V,VOUT=3.3V VIN=16V,VOUT=3.3 V 0.01 0.1 1 Load Current (A) 10 Figure 2. Schematic Diagram A.

Part

SY8105

Description

Synchronous Step Down Regulator



Feature


Applications Note:AN_SY8105 High Efficie ncy, 500kHz, 5A, 18V Input Synchronous Step Down Regulator General Descriptio n The SY8105 is a high efficiency 500 kHz synchronous step-down DC-DC convert er capable of delivering 5.0A current. The SY8105 operates over a wide input v oltage range from 4.5V to 18V and integ rates main switch and synchronous switc h with very low RD.
Manufacture

Silergy

Datasheet
Download SY8105 Datasheet




 SY8105
Applications Note:AN_SY8105
High Efficiency, 500kHz, 5A, 18V Input
Synchronous Step Down Regulator
General Description
The SY8105 is a high efficiency 500 kHz synchronous
step-down DC-DC converter capable of delivering
5.0A current. The SY8105 operates over a wide input
voltage range from 4.5V to 18V and integrates 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 500 kHz
switching frequency. It adopts the instant PWM
architecture to achieve fast transient responses for high
step down applications
Ordering Information
SY8105 (□□)
Temperature Code
Package Code
Optional Spec Code
Ordering Number Package type Note
SY8105ADC
TSOT23-6
--
Features
low RDS(ON) for internal switches (top/bottom):
40mΩ/26mΩ
4.5-18V input voltage range
5.0A output current capability
500 kHz switching frequency
Instant PWM architecture to achieve fast transient
responses.
Internal softstart limits the inrush current
Cycle-by-cycle peak current limitation
1.5% 0.6V reference
TSOT23-6 package
Applications
Set Top Box
Portable TV
Access Point Router
DSL Modem
LCD TV
Typical Applications
Figure 1. Schematic Diagram
100
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency vs. Load Current
VIN=5V,VOUT=3.3V
VIN=12V,VOUT=3.3V
VIN=16V,VOUT=3.3V
0.01
0.1
1
Load Current (A)
10
Figure 2. Schematic Diagram
AN_SY8105 Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
1




 SY8105
Pinout (top view)
AN_SY8105
FB BS
EN LX
GND
IN
TSOT23-6(FC)
Top Mark: NYxyz, (Device code: NY, x=year code, y=week code, z= lot number code)
Pin Name
FB
EN
GND
IN
LX
BS
Pin Number
1
2
3
4
5
6
Pin Description
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)
Enable control. Pull high to turn on. Do not float.
Ground pin
Input pin. Decouple this pin to GND pin with at least 1uF ceramic cap
Inductor pin. Connect this pin to the switching node of inductor
Boot-Strap Pin. Supply high side gate driver. Decouple this pin to LX pin with
0.1uF ceramic cap.
Absolute Maximum Ratings (Note 1)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 19V
Enable Voltage----------------------------------------------------------------------------------------------------- VIN + 0.3V
FB Voltage ------------------------------------------------------------------------------------------------------------------- 4V
Power Dissipation, PD @ TA = 25°C, TSOT23-6FC-------------------------------------------------------- 1.75W
Package Thermal Resistance (Note 2)
θ JA -------------------------------------------------------------------------------------------------------------- 56°C /W
θ JC -------------------------------------------------------------------------------------------------------------- 6.3°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 ------------------------------------------------------------------------------------------------ 4.5V to 18V
Junction Temperature Range ----------------------------------------------------------------------------------- -40°C to 125°C
Ambient Temperature Range ----------------------------------------------------------------------------------- -40°C to 85°C
AN_SY8105 Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
2




 SY8105
Block Diagram
AN_SY8105
AN_SY8105 Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
3



Recommended third-party SY8105 Datasheet






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