(Hong Kong)
Product Summary
The LQH55DN4R7M03L SwitchReg is a member of AnalogicTechs Total Power Management IC (TPMIC) product family. The step-down switching converter is ideal for applications where fixed frequency and low ripple are required over the fullrange of load conditions. The 2.7V to 5.5V inputvoltage range makes the LQH55DN4R7M03L ideal for singlecelllithium-ion/polymer battery applications.Capable of up to 1.2A with internal MOSFETs, thecurrent-mode controlled IC provides high efficiencyover a wide operating range. Fully integrated compensationsimplifies system design and lowersexternal parts count. The LQH55DN4R7M03L operates at afixed 1MHz switching frequency across all loadconditions. Applications are (1)HDD MP3 players; (2)notebook computers; (3)PDAs; (4)point-of-load regulation; (5)set top boxes; (6)smart phones; (7)wireless notebook adapters.
Parametrics
LQH55DN4R7M03L absolute maximum ratings: (1)Supply Voltage: 20V; (2)Power Dissipation: 500 mW; (3)Differential Input Current: 10 mA; (4)Input Voltage: 15V; (5)Output Short-Circuit Duration Continuous; (6)Operating Free Air Temperature Range: -25°C to °C85; (7)Storage Temperature Range: -65 to 150°C ; (8)Lead Temperature (Soldering, 10 sec.) (DIP): 260°C.
Features
LQH55DN4R7M03L features: (1)VIN Range: 2.7V to 5.5V; (2)Up to 95% Efficiency; (3)110 mΩ RDS(ON) Internal Switches; (4)<1μA Shutdown Current; (5)1MHz Buck Switching Frequency; (6)Fixed or Adjustable VOUT ≥ 0.8V; (7)Integrated Power Switches; (8)Current Mode Operation; (9)Internal Compensation; (10)Stable with Ceramic Capacitors; (11)Constant PWM Operation for Low Output Ripple; (12)Internal Soft Start; (13)Over-Temperature Protection; (14)Current Limit Protection; (15)16-Pin QFN 3x3mm Package; (16)-40°C to +85°C Temperature Range.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||||
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 LQH55DN4R7M03L |
Murata |
Power Inductors 4.7uH 20% |
Data Sheet |
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| Image | Part No | Mfg | Description | |
Pricing (USD) |
Quantity | ||||||||||||||
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LQH55DN100M01L |
Murata |
Power Inductors 2220 10uH +/-20% |
Data Sheet |
Negotiable |
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LQH55DN100M03K |
Murata |
Power Inductors 2220 10uH +/-20% |
Data Sheet |
Negotiable |
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LQH55DN100M03L |
Murata |
Power Inductors 10uH 20% |
Data Sheet |
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LQH55DN101M01L |
Murata |
Power Inductors 2220 100uH +/-20% |
Data Sheet |
Negotiable |
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LQH55DN101M03L |
Murata |
Power Inductors 100uH 20% |
Data Sheet |
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LQH55DN102M01L |
Murata |
Power Inductors 2220 1000uH +/-20% |
Data Sheet |
Negotiable |
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