Datasheet MAX866, MAX867 (Maxim) - 6
| 制造商 | Maxim |
| 描述 | 3.3V/5V or Adjustable Output, Single-Cell DC-DC Converters |
| 页数 / 页 | 12 / 6 — 3.3V/5V or Adjustable-Output, Single-Cell DC-DC Converters |
| 文件格式/大小 | PDF / 143 Kb |
| 文件语言 | 英语 |
3.3V/5V or Adjustable-Output, Single-Cell DC-DC Converters
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3.3V/5V or Adjustable-Output, Single-Cell DC-DC Converters ____________________________Typical Operating Characteristics (continued)
(Circuits of Figure 2, TA = +25°C, unless otherwise noted.)
OUTPUT CURRENT CAPABILITY QUIESCENT SUPPLY CURRENT REFERENCE VOLTAGE vs. TEMPERATURE vs. TEMPERATURE vs. TEMPERATURE
30 30 1.255 VIN = 1.2V MAX866/67-27 µA) VOUT = 3.47V MAX866/67-28 MAX866/67-29 28 25 26 IOUT 1.250 20 24 VIN = 0.9V IREF = 0A OUTPUT CURRENT (mA) 15 REFERENCE VOLTAGE (V)
MAX866/MAX867
22 QUIESCENT SUPPLY CURRENT ( 3.3V MODE 10 20 1.245 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C)
______________________________________________________________Pin Description PIN NAME FUNCTION MAX866 MAX867
–———– Shutdown Input. When low, the entire circuit is off and VOUT = VIN - VD, where VD is the 1 1 SHDN forward voltage drop of the external Schottky rectifier. – 2 — 3/5 Selects the output voltage; connect to GND for 5V output, and to OUT for 3.3V output. Feedback Input for adjustable-output operation. Connect to an external resistor voltage — 2 FB divider between OUT and GND. 1.25V Reference Voltage Output. Bypass with 0.22µF to GND (0.1µF if there is no external 3 3 REF reference load). Maximum load capability is 250µA source, 20µA sink. Low-Battery Output. An open-drain N-channel MOSFET sinks current when the voltage at 4 4 LBO LBI drops below 1.25V. Low-Battery Input. When the voltage on LBI drops below 1.25V, LBO sinks current. 5 5 LBI If not used, connect to VIN. 6 6 OUT Connect OUT to the regulator output. OUT provides bootstrap power to the IC. 7 7 GND Power Ground. Must be low impedance; solder directly to ground plane. 8 8 LX N-Channel Power-MOSFET Drain
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(Circuits of Figure 2, TA = +25°C, unless otherwise noted.)
OUTPUT CURRENT CAPABILITY QUIESCENT SUPPLY CURRENT REFERENCE VOLTAGE vs. TEMPERATURE vs. TEMPERATURE vs. TEMPERATURE
30 30 1.255 VIN = 1.2V MAX866/67-27 µA) VOUT = 3.47V MAX866/67-28 MAX866/67-29 28 25 26 IOUT 1.250 20 24 VIN = 0.9V IREF = 0A OUTPUT CURRENT (mA) 15 REFERENCE VOLTAGE (V)
MAX866/MAX867
22 QUIESCENT SUPPLY CURRENT ( 3.3V MODE 10 20 1.245 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C)
______________________________________________________________Pin Description PIN NAME FUNCTION MAX866 MAX867
–———– Shutdown Input. When low, the entire circuit is off and VOUT = VIN - VD, where VD is the 1 1 SHDN forward voltage drop of the external Schottky rectifier. – 2 — 3/5 Selects the output voltage; connect to GND for 5V output, and to OUT for 3.3V output. Feedback Input for adjustable-output operation. Connect to an external resistor voltage — 2 FB divider between OUT and GND. 1.25V Reference Voltage Output. Bypass with 0.22µF to GND (0.1µF if there is no external 3 3 REF reference load). Maximum load capability is 250µA source, 20µA sink. Low-Battery Output. An open-drain N-channel MOSFET sinks current when the voltage at 4 4 LBO LBI drops below 1.25V. Low-Battery Input. When the voltage on LBI drops below 1.25V, LBO sinks current. 5 5 LBI If not used, connect to VIN. 6 6 OUT Connect OUT to the regulator output. OUT provides bootstrap power to the IC. 7 7 GND Power Ground. Must be low impedance; solder directly to ground plane. 8 8 LX N-Channel Power-MOSFET Drain
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