Analog Devices Inc. LTC36xx/LTC7149シリーズ降圧型バックレギュレータ

Linear Technology/Analog Devices LTC36xx/LTC7149シリーズ同期バックレギュレータは、高効率、モノリシックで、反転出力アプリケーションに優れています。LTC3623およびLTC3600は、1台の外付けレジスタでプログラミングされています。LTC3649およびLTC7149は、シングルレジスタプログラマブル出力電圧が特徴で、広いV_OUT範囲全体で高い効率性が備わっています。

LTC7149には、3.4V～60Vの入力電圧範囲から動作する反転レギュレータがあります。LTC3649は入力電圧範囲が3.1V～60Vで、LTC3623およびLTC3600は作動電圧範囲が4V～15Vです。

LTC7149とLTC3649には、ピーク電流モードアーキテクチャがあり、サイクルからサイクルの固有の電流制限保護を備えた高速過渡応答が可能です。LTC3623およびLTC3600は、動作周波数は200kHz～4MHzで、降圧型比率の高いアプリケーションに最適で、独自の定オン時間アーキテクチャを備えています。

特徴

LTC7149
- 3.4V to 60V V_IN range
- 0V to -28V V_OUT range
- Single resistor V_OUT programming
- Integrated 110mΩ top N-channel/50mΩ bottom n-channel MOSFETs
- 440µA regulated IQ
- 15µA shutdown IQ
- Board GND referenced I/O pins (RUN, PGOOD, MODE/SYNC)
- Accurate resistor programmable frequency (300kHz to 3MHz) with ±50% frequency sync range
- 92% efficiency with 12 V_IN and -5V_OUT
- ±0.8% output voltage accuracy
- Peak current mode operation
- Burst Mode® operation, forced continuous mode
- Programmable soft-start
- Overtemperature protection
- Available in 28-lead (4mm x 5mm) QFN and TSSOP packages
LTC3649
- 3.1V to 60V V_IN range
- 0V to V_IN-0.5V V_OUT range
- Single resistor V_OUT programming
- Integrated 110mΩ top N-channel/50mΩ bottom n-channel MOSFETs
- 95% efficiency with 12V_IN and 5V_OUT
- 440µA regulated IQ
- 18µA shutdown IQ
- Accurate current monitoring (±4%) without sensor resistor
- Accurate resistor programmable frequency (300kHz to 3MHz) with ±50% frequency sync range
- Accurate programmable output current
- Input voltage regulation for MPPT applications
- ±0.8% output voltage accuracy
- Peak current mode operation
- Programmable wire drop compensation
- Burst Mode operation, forced continuous mode
- Internal compensation and programmable soft-start
- Overtemperature protection
- Available in thermally enhanced 28-lead (4mm x 5mm) QFN and TSSOP packages
LTC3623
- 0V to V_IN - 0.5V V_OUT range
- Silent Switcher® architecture
- Tight V_OUT regulation across V_OUT range
- ±5% output current monitor accuracy
- Programmable wire drop compensation
- Easy to parallel for higher current and heat spreading
- Input supply voltage regulation loop
- Up to 96% efficiency
- ±5A output current
- Integrated N-MOSFETs (60mΩ top and 30mΩ bottom)
- 400kHz to 4MHz adjustable switching frequency
- 4V to 15V V_IN range
- Current mode operation for excellent line and load transient response
- Shutdown mode draws less than 1µA supply current
- Low profile 24-lead 3mm x 5mm QFN package

LTC3600
- Single resistor programmable V_OUT
- Tight V_OUT regulation independent of V_OUT voltage
- Easy to parallel for higher current and heat spreading
- 0V to V_IN - 0.5V V_OUT range
- Up to 96% high efficiency
- 1.5A output current
- 200kHz to 4MHz adjustable frequency
- 4V to 15V V_IN range
- Current mode operation for excellent line and load transient response
- Zero supply current in shutdown
- Available in thermally enhanced 12-pin (3mm x 3mm) DFN and MSOP packages
LTC3607
- Up to 96% efficiency
- 55µA total quiescent current
- 2.25MHz constant frequency operation
- 100% duty cycle dropout operation
- Low-ripple (typical 30mVP-P) Burst Mode operation
- Peak current-mode control architecture for excellent line and load transient response
- 4.5V to 15V voltage input range
- 600mA/channel rated output current
- 0.6V reference allows low output voltages
- ±1.5% output voltage accuracy
- IQ<1µA shutdown current
- Internal compensation
- Power good outputs
- Externally frequency synchronization (1MHz to 4MHz)
- Independent internal soft-start for each channel
- Small 16-lead thermally enhanced thin QFN (3mm x 3mm) and MSE packages