FAN5232MTCX Fairchild Semiconductor, FAN5232MTCX Datasheet

IC CTRLR PWM BUCK ADJ 14TSSOP

FAN5232MTCX

Manufacturer Part Number
FAN5232MTCX
Description
IC CTRLR PWM BUCK ADJ 14TSSOP
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of FAN5232MTCX

Applications
Controller, LCD
Voltage - Input
5.6 ~ 24 V
Number Of Outputs
3
Voltage - Output
3.3V, 5V, Adjustable
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
14-TSSOP
Output Voltage
5 V to 16 V
Input Voltage
5.6 V to 24 V
Switching Frequency
300 KHz
Operating Temperature Range
- 20 C to + 85 C
Mounting Style
SMD/SMT
Duty Cycle (max)
80 %
Isolated/non-isolated
Non Isolated
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FAN5232MTCX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FAN5232MTCX_NL
Quantity:
206
Features
• Three outputs: Adjustable Buck, 3.3V-Always,
• Adjustable synchronous switcher, 5V – 80% Vin
• 1% internal reference precision
• Current mode with voltage feed-forward
• Precision current limit option
• Charge pump works at all loads
• No shoot-through current
• Independent shutdown pins for ACPI
• Power Good, input UVLO, output OV
• 5.6V to 24V input voltage range
Applications
• LCD PCs
• Notebook PCs and PDAs
• Hand-held portable instruments
Block Diagram
FAN5232
Adjustable PWM Buck Controller for LCD PCs
5V-Always
3.3V-Always
5V-Always
PWRGD
SDNADJ
SDWN
1
2
3
4
5
6
7
Vin = 16–22V
FAN5232
14
13
12
11
10
9
8
The FAN5232 is a high efficiency and high precision DC/DC
controller for PCs. It has a synchronous switcher whose
output can be adjusted from 5V up to 80% of Vin. It also has
two linear regulators for standby, 3.3V and 5V. The PWM
utilizes both input and output voltage feedback in a
current-mode control, allowing for fast and stable loop
response over a wide range of input and output variations.
Synchronous switching provides best efficiency over a wide
range of loads. Current sense based on MOSFET R
gives maximum efficiency, while also permitting use of an
optional sense resistor for high precision.
The FAN5232 is available in a 14 pin TSSOP package.
Description
www.fairchildsemi.com
REV. 1.1.1 10/7/02
+
12V @ 8A
DS,on

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FAN5232MTCX Summary of contents

Page 1

FAN5232 Adjustable PWM Buck Controller for LCD PCs Features • Three outputs: Adjustable Buck, 3.3V-Always, 5V-Always • Adjustable synchronous switcher, 5V – 80% Vin • 1% internal reference precision • Current mode with voltage feed-forward • Precision current limit option ...

Page 2

FAN5232 Pin Assignments 3V_ALWAYS 5V_ALWAYS Pin Description Pin Number Pin Name 1 VBATT 2 3V_ALWAYS 3 5V_ALWAYS 4 AGND 5 SDWN 6 SDNADJ 7 PWRGD 8 VFBSW 9 PGND 10 LSD ISNS 13 HSD 14 CPUMP Absolute ...

Page 3

PRODUCT SPECIFICATION Recommended Operating Conditions Parameter VBATT Voltage Ambient Temperature Electrical Specifications (V = 16V -20 to 85°C, circuit of Figure 1, unless otherwise specified.) BATT A Parameter Supply V Input Quiescent Current CC V Input UVLO Threshold ...

Page 4

FAN5232 Electrical Specifications (V = 16V -20 to 85°C, circuit of Figure 1, unless otherwise specified.) BATT A Parameter Control and Signal Functions Control Logic Low Control Logic High Softstart Current Over-temperature Shutdown Over-temperature Hysteresis PWRGD Threshold PWRGD ...

Page 5

PRODUCT SPECIFICATION Table 1. RC5232 Application Bill of Materials Reference Manufacturer, Part # C1 SANYO 25SV47M C2-5 Any C6 AVX TPSE227M016#0100 R1 Any R2, R4 Any R3, R5 Any R6 Any D1 Fairchild MBR0540L L1 Coiltronics UP2B-1R5 Q1 Fairchild FDS6690A ...

Page 6

FAN5232 Loop Compensation The switcher regulator control loop of the FAN5232 is current-mode with voltage feed-forward. It uses voltage feed-forward to guarantee loop rejection of input voltage variation: the ramp amplitude is varied as a function of the input voltage. ...

Page 7

PRODUCT SPECIFICATION The purpose of these two supplies -whose combined current is specified to never exceed 50mA provide power to the system micro-controller (8051 class) as well as a few other ICs needing a stand-by power. The micro-controller ...

Page 8

FAN5232 Mechanical Dimensions 14-Lead TSSOP Inches Millimeters Symbol Min. Max. Min. A — .047 — A1 .002 .006 0.05 A2 .031 .041 0.80 B .007 0.17 .011 C .004 .008 0.09 D .252 .260 6.40 H .252 BSC E .169 ...

Page 9

... FAN5232MTC 14 Lead TSSOP DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...

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