Datasheet LTC3410 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 2.25MHz, 300mA Synchronous Step-Down Regulator in SC70 |
| Seiten / Seite | 16 / 1 — FEATURES. DESCRIPTIO. High Efficiency: Up to 96%. Low Ripple (20mVP-P) … |
| Dateiformat / Größe | PDF / 340 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTIO. High Efficiency: Up to 96%. Low Ripple (20mVP-P) Burst Mode Operation: IQ 26. Low Output Voltage Ripple
Modelllinie für dieses Datenblatt
- LTC3410ESC6#PBF LTC3410ESC6#TRMPBF LTC3410ESC6#TRPBF LTC3410ESC6-1.2#PBF LTC3410ESC6-1.2#TRMPBF LTC3410ESC6-1.2#TRPBF LTC3410ESC6-1.5#PBF LTC3410ESC6-1.5#TRMPBF LTC3410ESC6-1.5#TRPBF LTC3410ESC6-1.65#PBF LTC3410ESC6-1.65#TRMPBF LTC3410ESC6-1.65#TRPBF LTC3410ESC6-1.8#PBF LTC3410ESC6-1.8#TRMPBF LTC3410ESC6-1.8#TRPBF
Textversion des Dokuments
LTC3410 2.25MHz, 300mA Synchronous Step-Down Regulator in SC70
U FEATURES DESCRIPTIO
■
High Efficiency: Up to 96%
The LTC®3410 is a high efficiency monolithic synchro- ■
Low Ripple (20mVP-P) Burst Mode Operation: IQ 26
µ
A
nous buck regulator using a constant frequency, current ■
Low Output Voltage Ripple
mode architecture. The device is available in adjustable ■
300mA Output Current at VIN = 3V
and fixed output voltage versions. Supply current during ■
380mA Minimum Peak Switch Current
operation is only 26µA, dropping to <1µA in shutdown. ■
2.5V to 5.5V Input Voltage Range
The 2.5V to 5.5V input voltage range makes the LTC3410 ■
2.25MHz Constant Frequency Operation
ideally suited for single Li-Ion battery-powered applica- ■
No Schottky Diode Required
tions. 100% duty cycle provides low dropout operation, ■
Low Dropout Operation: 100% Duty Cycle
extending battery life in portable systems. ■
Stable with Ceramic Capacitors
Switching frequency is internally set at 2.25MHz, allowing ■ 0.8V Reference Allows Low Output Voltages the use of small surface mount inductors and capacitors. ■ Shutdown Mode Draws < 1µA Supply Current ■ ±2% Output Voltage Accuracy The LTC3410 is specifically designed to work well with ■ Current Mode Operation for Excellent Line and ceramic output capacitors, achieving very low output Load Transient Response voltage ripple and a small PCB footprint. ■ Overtemperature Protected The internal synchronous switch increases efficiency and ■ Available in Low Profile SC70 Package eliminates the need for an external Schottky diode. Low
U
output voltages are easily supported with the 0.8V feed-
APPLICATIO S
back reference voltage. The LTC3410 is available in a tiny, low profile SC70 package. ■ Cellular Telephones , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All ■ Wireless and DSL Modems other trademarks are the property of their respective owners. Protected by U.S. Patents, ■ Digital Cameras including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 5994885. ■ MP3 Players ■ Portable Instruments
U TYPICAL APPLICATIO Efficiency and Power Loss vs Output Current
100 1 90 V 4.7µH IN VOUT 80 2.7V VIN SW 2.5V 0.1 TO 5.5V C 10pF EFFICIENCY IN POWER LOSS (W) C 70 4.7µF LTC3410 OUT 4.7µF CER 60 RUN CER V 50 0.01 FB 887k GND 40 POWER LOSS 412k EFFICIENCY (%) 30 3410 TA01a 0.001 20 VIN = 2.7V VIN = 3.6V 10 VIN = 4.2V 0 0.0001 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3410 TA01b 3410fb 1
U FEATURES DESCRIPTIO
■
High Efficiency: Up to 96%
The LTC®3410 is a high efficiency monolithic synchro- ■
Low Ripple (20mVP-P) Burst Mode Operation: IQ 26
µ
A
nous buck regulator using a constant frequency, current ■
Low Output Voltage Ripple
mode architecture. The device is available in adjustable ■
300mA Output Current at VIN = 3V
and fixed output voltage versions. Supply current during ■
380mA Minimum Peak Switch Current
operation is only 26µA, dropping to <1µA in shutdown. ■
2.5V to 5.5V Input Voltage Range
The 2.5V to 5.5V input voltage range makes the LTC3410 ■
2.25MHz Constant Frequency Operation
ideally suited for single Li-Ion battery-powered applica- ■
No Schottky Diode Required
tions. 100% duty cycle provides low dropout operation, ■
Low Dropout Operation: 100% Duty Cycle
extending battery life in portable systems. ■
Stable with Ceramic Capacitors
Switching frequency is internally set at 2.25MHz, allowing ■ 0.8V Reference Allows Low Output Voltages the use of small surface mount inductors and capacitors. ■ Shutdown Mode Draws < 1µA Supply Current ■ ±2% Output Voltage Accuracy The LTC3410 is specifically designed to work well with ■ Current Mode Operation for Excellent Line and ceramic output capacitors, achieving very low output Load Transient Response voltage ripple and a small PCB footprint. ■ Overtemperature Protected The internal synchronous switch increases efficiency and ■ Available in Low Profile SC70 Package eliminates the need for an external Schottky diode. Low
U
output voltages are easily supported with the 0.8V feed-
APPLICATIO S
back reference voltage. The LTC3410 is available in a tiny, low profile SC70 package. ■ Cellular Telephones , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All ■ Wireless and DSL Modems other trademarks are the property of their respective owners. Protected by U.S. Patents, ■ Digital Cameras including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 5994885. ■ MP3 Players ■ Portable Instruments
U TYPICAL APPLICATIO Efficiency and Power Loss vs Output Current
100 1 90 V 4.7µH IN VOUT 80 2.7V VIN SW 2.5V 0.1 TO 5.5V C 10pF EFFICIENCY IN POWER LOSS (W) C 70 4.7µF LTC3410 OUT 4.7µF CER 60 RUN CER V 50 0.01 FB 887k GND 40 POWER LOSS 412k EFFICIENCY (%) 30 3410 TA01a 0.001 20 VIN = 2.7V VIN = 3.6V 10 VIN = 4.2V 0 0.0001 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3410 TA01b 3410fb 1