FAN5234MTCX Fairchild Semiconductor, FAN5234MTCX Datasheet - Page 3

• Manufacturer Part Number: FAN5234MTCX
• Description: IC CTRLR PWM/PFM MOBILE 16TSSOP
• Manufacturer: Fairchild Semiconductor

Specifications of FAN5234MTCX

• Applications: Controller, Mobile PCs
• Voltage - Input: 2 ~ 24 V
• Number Of Outputs: 1
• Voltage - Output: 0.9 ~ 5.5 V
• Operating Temperature: -10°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Output Voltage: 0.9 V to 15 V
• Input Voltage: 2 V to 24 V
• Switching Frequency: 300 KHz to 600 KHz
• Operating Temperature Range: - 10 C to + 85 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 87 %
• Isolated/non-isolated: Non Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2004 Fairchild Semiconductor Corporation
FAN5234 • Rev. 2.0.0
Pin Configuration
Pin Definitions
Pin #
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
PGOOD
FPWM
Name
AGND
PGND
HDRV
BOOT
VOUT
VSEN
LDRV
ISNS
VCC
ILIM
VIN
SW
EN
SS
Input Voltage. Connect to main input power source (battery), also used to program
operating frequency for low input voltage operation (see Table 1).
Power-Good Flag. An open-drain output that pulls LOW when V
range of the 0.9V reference.
Enable. Enables operation when pulled to logic HIGH. Toggling EN resets the regulator
after a latched fault condition. This is a CMOS input whose state is indeterminate if left open.
Current Limit. A resistor from this pin to GND sets the current limit.
Output Voltage. Connect to output voltage. Used for regulation to ensure a smooth
transition during mode changes. When V
Output Voltage Sense. The feedback from the output. Used for regulation as well as
power-good, under-voltage, and over-voltage protection monitoring.
Soft-Start. A capacitor from this pin to GND programs the slew rate of the converter during
initialization, when this pin is charged with a 5µA current source.
Analog Ground. This is the signal ground reference for the IC. All voltage levels are
measured with respect to this pin.
Power Ground. The return for the low-side MOSFET driver output. Connect to the gate of
the low-side MOSFET.
Low-Side Drive. The low-side (lower) MOSFET driver output. Connect to the gate of the
low-side MOSFET.
Supply Voltage. This pin powers the chip as well as the LDRV buffers. The IC starts to
operate when voltage on this pin exceeds 4.6V (UVLO rising) and shuts down when it drops
below 4.3V (UVLO falling).
Current-Sense Input. Monitors the voltage drop across the lower MOSFET or external
sense resistor for current feedback.
Switching Node. Return for the high-side MOSFET driver and a current-sense input.
Connect to source of high-side MOSFET and low-side MOSFET drain.
High-Side Drive. High-side (upper) MOSFET driver output. Connect to the gate of the high-
side MOSFET.
BOOT. Positive supply for the upper MOSFET driver. Connect as shown in Figure 2.
Forced PWM Mode. When logic HIGH, inhibits the regulation from entering Hysteretic
Mode.
PGOOD
AGND
VOUT
VSEN
ILIM
VIN
EN
SS
Figure 3. Pin Configuration
1
2
3
4
5
6
7
8
FA N5234
3
16
15
14
13
12
11
10
Description
9
OUT
is expected to exceed V
FPWM
BOOT
HDRV
SW
ISNS
VCC
LDRV
PGND
SEN
is outside of a ±10%
CC
, tie this pin to V
www.fairchildsemi.com
CC
.