Datasheet LTC1174, LTC1174-3.3, LTC1174-5 (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | High Efficiency Step-Down and Inverting DC/DC Converter |
| Páginas / Página | 20 / 6 — PI FU CTIO S. SW (Pin 5):. OUT (VFB) (Pin 1):. VIN (Pin 6):. LBOUT (Pin … |
| Formato / tamaño de archivo | PDF / 263 Kb |
| Idioma del documento | Inglés |
PI FU CTIO S. SW (Pin 5):. OUT (VFB) (Pin 1):. VIN (Pin 6):. LBOUT (Pin 2):. IPGM (Pin 7):. LBIN (Pin 3):. SHUTDOWN (Pin 8):
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- LTC1174CN8#PBF LTC1174CN8-3.3#PBF LTC1174CN8-5#PBF LTC1174CS8#PBF LTC1174CS8#TRPBF LTC1174CS8-3.3#PBF LTC1174CS8-3.3#TRPBF LTC1174CS8-5#PBF LTC1174CS8-5#TRPBF LTC1174HVCN8#PBF LTC1174HVCN8-3.3#PBF LTC1174HVCN8-5#PBF LTC1174HVCS8#PBF LTC1174HVCS8#TRPBF LTC1174HVCS8-3.3#PBF LTC1174HVCS8-3.3#TRPBF LTC1174HVCS8-5#PBF LTC1174HVCS8-5#TRPBF LTC1174HVIS8#PBF LTC1174HVIS8#TRPBF LTC1174IN8#PBF LTC1174IS8#PBF LTC1174IS8#TRPBF
Versión de texto del documento
LTC1174 LTC1174-3.3/LTC1174-5
U U U PI FU CTIO S V SW (Pin 5):
Drain of the P-Channel MOSFET Switch. Cathode
OUT (VFB) (Pin 1):
For the LTC1174, this pin connects to the main voltage comparator’s input. On the LTC1174-3.3 and of Schottky diode must be closely connected to this pin. LTC1174-5 this pin goes to an internal resistive divider
VIN (Pin 6):
Input Supply Voltage. It must be decoupled which sets the output voltage. close to ground Pin 4.
LBOUT (Pin 2):
Open Drain of an N-Channel Pull-Down. This
IPGM (Pin 7):
Selects the Current Limit of the P-Channel pin will sink current when Pin 3 (LBIN) goes below 1.25V. Switch. With IPGM = VIN, the current trip point is 600mA and During shutdown the state of this pin is indeterminate. with IPGM = 0V, the current trip value is reduced to 340mA.
LBIN (Pin 3):
The “–” Input of the Low-Battery Voltage
SHUTDOWN (Pin 8):
Pulling this pin to ground keeps the Comparator. The “+” input is connected to a reference internal switch off and puts the LTC1174 in micropower voltage of 1.25V. shutdown.
GND (Pin 4):
Ground Pin.
U U W FU CTIO AL DIAGRA (Pin 1 connection shown for LTC1174-3.3 and LTC1174-5, changes create LTC1174)
VIN 6 V V LIM1 LIM2 + IPGM RSENSE VTH2 A5 SLEEP 7 0.1Ω + – A2 – – A4 RESET Q C + gmVFB T V SET OUT (VFB) VTH1 1 5 × SW LBIN R1* LBOUT 2 3 V – FB – A1 31.5k A3 SHUTDOWN + 1.25V + 8 REFERENCE GND 4 1174 BD * R1 = 51k FOR LTC1174-3.3 R1 = 93.5k FOR LTC1174-5 1174fe 6
U U U PI FU CTIO S V SW (Pin 5):
Drain of the P-Channel MOSFET Switch. Cathode
OUT (VFB) (Pin 1):
For the LTC1174, this pin connects to the main voltage comparator’s input. On the LTC1174-3.3 and of Schottky diode must be closely connected to this pin. LTC1174-5 this pin goes to an internal resistive divider
VIN (Pin 6):
Input Supply Voltage. It must be decoupled which sets the output voltage. close to ground Pin 4.
LBOUT (Pin 2):
Open Drain of an N-Channel Pull-Down. This
IPGM (Pin 7):
Selects the Current Limit of the P-Channel pin will sink current when Pin 3 (LBIN) goes below 1.25V. Switch. With IPGM = VIN, the current trip point is 600mA and During shutdown the state of this pin is indeterminate. with IPGM = 0V, the current trip value is reduced to 340mA.
LBIN (Pin 3):
The “–” Input of the Low-Battery Voltage
SHUTDOWN (Pin 8):
Pulling this pin to ground keeps the Comparator. The “+” input is connected to a reference internal switch off and puts the LTC1174 in micropower voltage of 1.25V. shutdown.
GND (Pin 4):
Ground Pin.
U U W FU CTIO AL DIAGRA (Pin 1 connection shown for LTC1174-3.3 and LTC1174-5, changes create LTC1174)
VIN 6 V V LIM1 LIM2 + IPGM RSENSE VTH2 A5 SLEEP 7 0.1Ω + – A2 – – A4 RESET Q C + gmVFB T V SET OUT (VFB) VTH1 1 5 × SW LBIN R1* LBOUT 2 3 V – FB – A1 31.5k A3 SHUTDOWN + 1.25V + 8 REFERENCE GND 4 1174 BD * R1 = 51k FOR LTC1174-3.3 R1 = 93.5k FOR LTC1174-5 1174fe 6