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CS5212 Datasheet

Low Voltage Synchronous Buck Controller

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CS5212
Low Voltage Synchronous
Buck Controller
The CS5212 is a low voltage synchronous buck controller. It
contains all required circuitry for a synchronous buck converter using
external N–Channel MOSFETs. High current internal gate drivers are
capable of driving high gate capacitance of low RDS(on) NFETs for
better efficiency. The V2control architecture is used to achieve
unmatched transient response, the best overall regulation and the
simplest loop compensation.
Additionally, the CS5212 provides overcurrent protection,
undervoltage lockout, soft start, built–in adaptive non–overlap, and an
adjustable fixed frequency range of 150 kHz to 750 kHz, which gives
the designer more flexibility to make efficiency and component size
trade offs. The CS5212 will also operate over a 3.1 V to 7.0 V range
using either single or dual input voltage.
Features
Switching Regulator Controller
N–Channel Synchronous Buck Design
V2 Control Topology
200 ns Transient Response
Programmable Fixed Frequency of 150 kHz–750 kHz
1.0 V 1.5% Internal Reference
Lossless Inductor Sensing Overcurrent Protection
Hiccup Mode Short Circuit Protection
Programmable Soft Start
40 ns GATE Rise and Fall Times (3.3 nF Load)
70 ns Adaptive FET Nonoverlap Time
Differential Remote Sense Capability
Available in Industrial and Commerical Temperature Grades
System Power Management
3.3 V Operation
Undervoltage Lockout
On/Off Control Through Use of the COMP Pin
http://onsemi.com
MARKING
DIAGRAM
14
SOIC–14
D SUFFIX
CASE 751A
CS5212x
AWLYWW
1
x
A
WL, L
YY, Y
WW, W
= E or G
= Assembly Location
= Wafer Lot
= Year
= Work Week
PIN CONNECTIONS
1
GATE(H)
BST
LGND
VFFB
VFB
COMP
SGND
PGND
GATE(L)
VC
IS+
IS–
VCC
ROSC
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
© Semiconductor Components Industries, LLC, 2002
May, 2002 – Rev. 2
1
Publication Order Number:
CS5212/D


  ON Semiconductor Electronic Components Datasheet  

CS5212 Datasheet

Low Voltage Synchronous Buck Controller

No Preview Available !

CS5212
VIN
3.3 V
D6
BAT54S
TP5
BST TP4
COMP
R7
TBD*
GN2
GND
C2
0.1 µF
R8
10
D5
BAT54S
D2
BAT54S
C4
0.1 µF
TP2
GATE(H)
C22 TP1
0.1 µF SWNODE
Q1
TP3
GATE(L)
C11
U1 0.1 µF
1 GATE(H) PGND 14
2 BST
GATE(L) 13
3 LGND
VC 12
4 VFFB CS5212
5 VFB
IS+ 11
IS– 10
6 COMP
VCC 9
7 SGND
ROSC 8
R1
51 k
R9
10 Q2
C1
0.47 µF
C19
1.0 µF
R4
1.0 k 1%
C6 C7 C8 100 µF/10 V × 3
+ ++
6.5 mR
ETQP6F2R9LB
VOUT
R5
4.7 k
L1
2.9 µH
C10 C20 C21
++++
C9
C15
470 pF
R13
10
100 µF/10 V
×2
GND
C3
0.1 µF
C16
0.1 µF
R6
4.7 k
C5
680 pF
R3
1.5 k 1%
R2
10
TP6
SENSE+
*Refer to Rpullup Value Selection section for value needed.
TP7
SENSE–
Figure 1. Application Diagram, 3.3 V to 1.5 V/8.0 A Converter with Differential Remote Sense
MAXIMUM RATINGS*
Rating
Operating Junction Temperature, TJ
Lead Temperature Soldering:
Storage Temperature Range, TS
Package Thermal Resistance:
Junction–to–Case, RθJC
Junction–to–Ambient, RθJA
ESD Susceptibility:
Human Body Model
Machine Model
JEDEC Moisture Sensitivity
1. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
Reflow: (SMD styles only) (Note 1)
Value
150
230 peak
–65 to +150
Unit
°C
°C
°C
30 °C/W
125 °C/W
2.0 kV
200 V
1–
http://onsemi.com
2


Part Number CS5212
Description Low Voltage Synchronous Buck Controller
Maker ON Semiconductor
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CS5212 Datasheet PDF






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