LM3485MM/NOPB National Semiconductor, LM3485MM/NOPB Datasheet - Page 7

• 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

Discontinuous Mode Operation
Operating Frequency vs Input Voltage
(V
= 12V, V
=3.3 V, I
= 50mA, L = 22µH)
(V
= 3.3V, I
= 1A, C
= 80mΩ, C
= 100pF)
IN
OUT
OUT
OUT
OUT
OUT(ESR)
ff
20034616
20034613
Output Ripple Voltage vs Input Voltage
Operating Frequency vs
Output Load Current
(V
= 3.3V, I
= 1A, C
= 80mΩ, C
= 100pF)
OUT
OUT
OUT(ESR)
ff
(L = 22µH, C
= 45mΩ, C
= 100pF)
OUT(ESR)
ff
20034643
20034621
Feed-Forward Capacitor (Cff) Effect
(V
= 3.3V, L = 22µH, I
= 500mA)
OUT
OUT
20034630
7
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