Buck Regulator. FAN23SV04T Datasheet

FAN23SV04T Regulator. Datasheet pdf. Equivalent

FAN23SV04T Datasheet
Recommendation FAN23SV04T Datasheet
Part FAN23SV04T
Description 4A Synchronous Buck Regulator
Feature FAN23SV04T; FAN23SV04T — 4 A Synchronous Buck Regulator for DDR Termination September 2015 FAN23SV04T 4 A Sync.
Manufacture Fairchild Semiconductor
Datasheet
Download FAN23SV04T Datasheet




Fairchild Semiconductor FAN23SV04T
September 2015
FAN23SV04T
4 A Synchronous Buck Regulator for DDR Termination
Features
VIN Range: 7 V to 18 V Using Internal Linear
Regulator for Bias
VIN Range: 4.5 V to 5.5 V with VIN/PVIN/PVCC
Connected to Bypass Internal Regulator
High Efficiency
Continuous Output Current: 4 A
Internal Linear Bias Regulator
Internal VDDQ Resistor Divider
Excellent Line and Load Transient Response
Output Voltage Range: 0.5 to 1.5 V
Programmable Frequency: 200 kHz to 1.5 MHz
Programmable Soft-Start
Low Shutdown Current
Adjustable Sourcing Current Limit
Internal Boot Diode
Thermal Shutdown
Halogen and Lead Free, RoHS Compliant
Applications
Bus Termination
Servers and Desktop Computers
NVDC Notebooks, Netbooks
Game Consoles
Description
The FAN23SV04T is a highly efficient, synchronous
buck regulator for use in tracking applications, such as
DDR termination rails. The VDDQ input includes an
internal 2:1 resistive voltage divider to reduce total
circuit size and component count. The regulator
operates with an input range from 7 V to 18 V and
supports up to 4 A load currents. The device can
operate from a 5 V rail (±10%) if VIN, PVIN, and PVCC
are connected together to bypass the internal linear
regulator.
This device utilizes Fairchilds constant on-time control
architecture to provide excellent transient response and
to maintain a relatively constant switching frequency.
Switching frequency and sourcing over-current
protection can be programmed to provide a flexible
solution for various applications.
Output over-current, and thermal shutdown protections
help prevent damage during fault conditions. A
hysteresis feature restarts the device when normal
operating temperature is reached.
Ordering Information
Part Number
Configuration
Operating
Output
Temperature Range Current
Package
FAN23SV04TMPX
PWM Mode with
VDDQ Tracking Input
-40 to 125°C
4 A 34-Lead, PQFN, 5.5 mm x 5.0 mm
© 2011 Fairchild Semiconductor Corporation
FAN23SV04T • Rev. 1.13
www.fairchildsemi.com



Fairchild Semiconductor FAN23SV04T
Typical Application Diagrams
VIN=12V
C3
0.1µF
VOUT=0.6V
C2
10µF
L1
1µH
C10d C10d C10b C10a
47µF 47µF 47µF 47µF
R3
10k
C4
0.1µF
R2
1k
C5
470pF
9876543 21
10 PVIN
11 PVIN
12 SW
13 SW
14 SW
15 SW
16 SW
17
SW
FAN23SV04T
NC
34
NC
33
FREQ 32
VDDQ
31
SS
30
EN
29
NC
28
FB 27
18 19 20 21 22 23 24 25 26
R11
10
R7
61.9k
R8
10k
VDDQ
R9
27.4k
C7
15nF
R5
1.02k
C9
2.2µF
C10
0.1µF
Figure 1. Typical Application with VIN = 12 V
VIN=5V
C3
0.1µF
VOUT=0.6V
C10d C10d C10b C10a
47µF 47µF 47µF 47µF
R3
10k
C2
10µF
L1
0.72µH
C4
0.1µF
R2
1k
C5
100pF
9876543 21
10 PVIN
11 PVIN
12 SW
13 SW
14 SW
15 SW
16 SW
17
SW
FAN23SV04T
NC
34
NC
33
FREQ 32
VDDQ
31
SS
30
EN
29
NC
28
FB 27
18 19 20 21 22 23 24 25 26
R11
10
R5 1.1k
C9
2.2µF
C10
0.1µF
VDDQ
EN
R9
C7 26.1k
15nF
Figure 2. Typical Application with VIN = 5 V
© 2011 Fairchild Semiconductor Corporation
FAN23SV04T • Rev. 1.13
2
www.fairchildsemi.com



Fairchild Semiconductor FAN23SV04T
Functional Block Diagram
PVCC
VCC
PVCC
VCC
EN
Linear
Regulator
VCC UVLO
ENABLE
VIN
FB
SS
VDDQ
FREQ
ILIM
Modulator
FB
Comparator
VCC
20µA
Thermal
Shutdown
Current Limit
Comparator
BOOT PVIN
PVCC
VCC
HS Gate
Driver
Control
Logic
PVCC
LS Gate
Driver
SW
AGND
Figure 3. Block Diagram
PGND
© 2011 Fairchild Semiconductor Corporation
FAN23SV04T • Rev. 1.13
3
www.fairchildsemi.com





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