CS5212GD14 ONSEMI [ON Semiconductor], CS5212GD14 Datasheet

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CS5212GD14

Manufacturer Part Number
CS5212GD14
Description
Low Voltage Synchronous Buck Controller
Manufacturer
ONSEMI [ON Semiconductor]
Datasheets

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Part Number:
CS5212GD14
Manufacturer:
ON Semiconductor
Quantity:
110
CS5212
Low Voltage Synchronous
Buck Controller
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 R
better efficiency. The V
unmatched transient response, the best overall regulation and the
simplest loop compensation.
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
*For additional information on our Pb−Free strategy and soldering details, please
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 4
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
The CS5212 is a low voltage synchronous buck controller. It
Additionally, the CS5212 provides overcurrent protection,
Switching Regulator Controller
System Power Management
Pb−Free Packages are Available*
N−Channel Synchronous Buck Design
V
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
3.3 V Operation
Undervoltage Lockout
On/Off Control Through Use of the COMP Pin
2
Control Topology
2
t control architecture is used to achieve
DS(on)
NFETs for
1
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
CS5212x =
A
WL
Y
WW
G
GATE(H)
ORDERING INFORMATION
COMP
LGND
SGND
V
MARKING DIAGRAM
14
BST
PIN CONNECTIONS
V
FFB
http://onsemi.com
1
FB
=
=
=
=
=
1
CASE 751A
AWLYWWG
D SUFFIX
SOIC−14
CS5212x
Device Code
x = E or G
Assembly Location
Wafer Lot
Year
Work Week
Pb−Free Package
Publication Order Number:
PGND
IS+
IS−
V
GATE(L)
V
R
CC
C
OSC
CS5212/D

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CS5212GD14 Summary of contents

Page 1

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 ...

Page 2

BAT54S D6 BAT54S D2 BAT54S TP5 BST TP4 COMP R7 U1 TBD* 1 GATE(H) 2 BST GATE(L) 3 LGND GN2 4 V FFB GND CS5212 0 COMP 7 SGND ...

Page 3

MAXIMUM RATINGS Pin Name IC Power Input Power input for the low side driver Power Supply input for the high side driver Compensation Capacitor Voltage Feedback Input Oscillator Resistor Fast Feedback Input High−Side FET Driver Low−Side FET Driver Positive Current ...

Page 4

ELECTRICAL CHARACTERISTICS (−40°C < T 3.5 V; 3.1 V < V < 7.0 V; 4.5 V < BST < Characteristic GATE(H) and GATE(L) GATE(H) to GATE(L) Delay GATE(H) < 2.0 V, GATE(L) > 2.0 V GATE(L) ...

Page 5

PACKAGE PIN DESCRIPTION PIN NO. PIN SYMBOL 1 GATE(H) High Side Switch FET driver pin. Capable of delivering peak currents of 1 BST Power supply input for the high side driver. 3 LGND Reference ground. All control circuits ...

Page 6

The CS5212 is a synchronous, fixed−frequency, low−voltage buck controller using the V control method. It also provides overcurrent protection, undervoltage lockout, soft−start and built−in adaptive non−overlap Control Method 2 The V method of control uses a ramp signal ...

Page 7

When the output voltage achieves a level set by the COMP voltage, the main ...

Page 8

APPLICATIONS AND COMPONENT SELECTION Inductor Component Selection The output inductor may be the most critical component in the converter because it will directly effect the choice of other components and dictate both the steady−state and transient performance of the converter. ...

Page 9

MOSFET power dissipation. Once the dissipation is known, the heat sink thermal impedance can be calculated to prevent the specified maximum case or junction temperatures from being exceeded at the highest ambient temperature. Power ...

Page 10

SA heatsink assuming direct mounting of the MOSFET (no thermal “pad” is used the specified maximum allowed junction J temperature the worst case ambient operating temperature. A For ...

Page 11

V Feedback Selection FFB 2 To take full advantage of the V control scheme, a small amount of output ripple must be fed back to the V typically 50 mV. For most application, this requirement is simple to achieve and ...

Page 12

... Device CS5212ED14 CS5212ED14G CS5212EDR14 CS5212EDR14G CS5212GD14 CS5212GD14G CS5212GDR14 CS5212GDR14G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Choosing components according to this equation will insure that approximately 63% of the boost voltage will be applied to GATE(H) within one switching period ...

Page 13

G −T− SEATING 14 PL PLANE 0.25 (0.010 trademark of Switch Power, Inc. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). ...

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