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Part Number: KB3511
Description: The KB3511 is a high efficiency monolithic synchronous buck regulator using a constant frequency, curr...
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KB3511
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General Description
KB3511 General Description
The KB3511 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version and fixed output voltages of 1.8V and 3.3V. Supply current during operation is only 25A and drops to 1A in shutdown. The 2.5V to 6.5V input voltage range makes the KB3511 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Automatic Trickle Mode operation increases efficiency at light loads, further extending battery life. Switching frequency is internally set at 2.2MHz, allowing the use of small surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The KB3511 is available in a low profile (0.8mm) DFN33-10 package.
KB3511 Maximum Ratings
Input Supply Voltage .................................. 0.3V to 6.5V
RUN, VFB Voltages ..................................... 0.3V to VIN
SW Voltage .................................. 0.3V to (VIN + 0.3V)
P-Channel Switch Source Current (DC) ............. 800mA
N-Channel Switch Sink Current (DC) ................. 800mA
Peak SW Sink and Source Current ........................ 1.3A
Operating Temperature Range (Note 2) .. 40 to 85
Junction Temperature (Note 3) ............................ 125
Storage Temperature Range ................ 65 to 150
Lead Temperature (Soldering, 10 sec)................. 300
RUN, VFB Voltages ..................................... 0.3V to VIN
SW Voltage .................................. 0.3V to (VIN + 0.3V)
P-Channel Switch Source Current (DC) ............. 800mA
N-Channel Switch Sink Current (DC) ................. 800mA
Peak SW Sink and Source Current ........................ 1.3A
Operating Temperature Range (Note 2) .. 40 to 85
Junction Temperature (Note 3) ............................ 125
Storage Temperature Range ................ 65 to 150
Lead Temperature (Soldering, 10 sec)................. 300
KB3511 Features
Up to 97% Efficiency
25uA No Load Current Per Channel
800mA Output Current
2.5V to 6.5V Input Voltage Range
2.2MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
0.6V Reference Allows Low Output Voltages
Shutdown Mode Draws1A Supply Current
Current Mode Operation for Excellent Line and Load Transient Response
Overtemperature Protected
DFN33-10 Package
25uA No Load Current Per Channel
800mA Output Current
2.5V to 6.5V Input Voltage Range
2.2MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
0.6V Reference Allows Low Output Voltages
Shutdown Mode Draws1A Supply Current
Current Mode Operation for Excellent Line and Load Transient Response
Overtemperature Protected
DFN33-10 Package
KB3511 Typical Application
Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instruments
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instruments
KB3511 Connection Diagram
KB3408B-1.8
PDF/DataSheet Download
- Datasheet: KB3408B-1.8
- File Size: 112624 KB
- Manufacturer: KINGBOR [Kingbor Technology Co]
- Click here to Download
- ·KB3541NT
- KINGBRIGHT [Kingbright Corporation]
- PHOTOCOUPLER
- 146039 KB
- ·KB357NT
- KINGBRIGHT [Kingbright Corporation]
- PHOTOCOUPLER
- 149210 KB
- ·KB3600
- General Semiconductor
- KB3600_General Semiconductor.pdf
- 502797 KB
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