LM3485MM/NOPB National Semiconductor, LM3485MM/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM3485MM/NOPB
• Description: IC CONTROLLER PFET 8-MSOP
• Manufacturer: National Semiconductor
• Type: Step-Down (Buck)r

Specifications of LM3485MM/NOPB

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 4A
• Voltage - Input: 4.5 ~ 35 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Power - Output: 417mW
• Dc To Dc Converter Type: Buck Controller
• Pin Count: 8
• Input Voltage: 4.5 to 35V
• Output Voltage: 1.242 to 35V
• Output Current: 4A
• Package Type: MSOP
• Mounting: Surface Mount
• Operating Temperature Classification: Automotive
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• For Use With: LM3485LED EVAL - BOARD EVALUATION LM3485LEDLM3485EVAL - BOARD EVALUATION LM3485
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Compliant
• Other names: LM3485MM; LM3485MMTR

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Package Marking and Ordering Information
Pin Descriptions
Order Number
LM3485MMX
LM3485MM
PWR GND
Pin Name
ISENSE
PGATE
GND
ADJ
VIN
NC
FB
Pin Number
Package Type
MSOP-8
1
2
3
4
5
6
7
8
The current sense input pin. This pin should be connected to Drain
node of the external PFET.
Signal ground.
No connection.
The feedback input. Connect the FB to a resistor voltage divider
between the output and GND for an adjustable output voltage.
Current limit threshold adjustment. It connects to an internal 5.5µA
current source. A resistor is connected between this pin and the input
Power Supply. The voltage across this resistor is compared with the
V
occurred.
Power ground.
Gate Drive output for the external PFET. PGATE swings between
V
Power supply input pin.
DS
IN
and V
of the external PFET to determine if an over-current condition has
IN
-5V.
Package Marking
2
S29B
S29B
Description
1000 units on Tape and Reel
3500 units on Tape and Reel
Supplied As