Datasheet MAX1836, MAX1837 (Maxim) - 2
| 制造商 | Maxim |
| 描述 | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| 页数 / 页 | 15 / 2 — Absolute Maximum Ratings. Note 1:. Electrical Characteristics. TA = 0°C … |
| 文件格式/大小 | PDF / 2.1 Mb |
| 文件语言 | 英语 |
Absolute Maximum Ratings. Note 1:. Electrical Characteristics. TA = 0°C to +85°C. PARAMETER. SYMBOL. CONDITIONS. MIN. TYP. MAX. UNITS
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MAX1836/MAX1837 24V Internal Switch, 100% Duty Cycle, Step-Down Converters
Absolute Maximum Ratings
IN, SHDN to GND...-0.3V to +25V Operating Temperature Range..-40°C to +85°C LX to GND...-2V to (VIN + 0.3V) Junction Temperature...+150°C OUT, FB to GND...-0.3V to +6V Storage Temperature Range...-65°C to +150°C Continuous Power Dissipation (TA = +70°C) (Note 1) Lead Temperature (soldering, 10s)...+300°C 6-Pin SOT23 (derate 8.7mW/°C above +70°C)...696mW 6-Pin TDFN (derate 24.4mW/°C above +70°C)...1951mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Note 1:
Thermal properties are specified with product mounted on PC board with 1in2 of copper area and still air.
Electrical Characteristics
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN,
TA = 0°C to +85°C
. Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Supply Range VIN 4.5 24 V Input Undervoltage Lockout VIN rising 3.55 4.0 4.4 Threshold VUVLO V VIN falling 3.45 3.9 4.3 Input Supply Current IIN 12 25 µA Input Supply Current in Dropout IIN(DROP) VIN = 5V 18 µA Input Shutdown Current SHDN = GND 3 7 µA FB = GND, MAX183_EUT50, MAX183_ETT50 4.80 5.00 5.20 Output Voltage (Preset Mode) V ILOAD = 0 to 125mA OUT (MAX1836) or V MAX183_EUT33, 250mA (MAX1837) MAX183_ETT33 3.168 3.30 3.432 Output Voltage Range (Adjustable Mode) VOUT (Note 2) 1.25 VIN V Feedback Set Voltage (Adjustable Mode) VFB 1.200 1.25 1.300 V OUT Bias Current VOUT = 5V 2.5 7.4 µA FB Bias Current IFB VFB = 0 or 1.25V, TA = +25°C -25 +25 nA FB Dual ModeTM Threshold VFB rising or falling 50 100 150 mV LX Switch Minimum Off-Time tOFF(MIN) 0.2 0.4 0.6 µs LX Switch Maximum On-Time tON(MAX) VFB = 1.3V 7 10 13 µs LX Switch On-Resistance RLX VIN = 6V 1.1 2 Ω MAX1836 250 312 450 LX Current Limit ILIM mA MAX1837 500 625 850 LX Zero-Crossing Threshold -75 +75 mV Dual Mode is a trademark of Maxim Integrated Products, Inc. www.maximintegrated.com Maxim Integrated │ 2
Absolute Maximum Ratings
IN, SHDN to GND...-0.3V to +25V Operating Temperature Range..-40°C to +85°C LX to GND...-2V to (VIN + 0.3V) Junction Temperature...+150°C OUT, FB to GND...-0.3V to +6V Storage Temperature Range...-65°C to +150°C Continuous Power Dissipation (TA = +70°C) (Note 1) Lead Temperature (soldering, 10s)...+300°C 6-Pin SOT23 (derate 8.7mW/°C above +70°C)...696mW 6-Pin TDFN (derate 24.4mW/°C above +70°C)...1951mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Note 1:
Thermal properties are specified with product mounted on PC board with 1in2 of copper area and still air.
Electrical Characteristics
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN,
TA = 0°C to +85°C
. Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Supply Range VIN 4.5 24 V Input Undervoltage Lockout VIN rising 3.55 4.0 4.4 Threshold VUVLO V VIN falling 3.45 3.9 4.3 Input Supply Current IIN 12 25 µA Input Supply Current in Dropout IIN(DROP) VIN = 5V 18 µA Input Shutdown Current SHDN = GND 3 7 µA FB = GND, MAX183_EUT50, MAX183_ETT50 4.80 5.00 5.20 Output Voltage (Preset Mode) V ILOAD = 0 to 125mA OUT (MAX1836) or V MAX183_EUT33, 250mA (MAX1837) MAX183_ETT33 3.168 3.30 3.432 Output Voltage Range (Adjustable Mode) VOUT (Note 2) 1.25 VIN V Feedback Set Voltage (Adjustable Mode) VFB 1.200 1.25 1.300 V OUT Bias Current VOUT = 5V 2.5 7.4 µA FB Bias Current IFB VFB = 0 or 1.25V, TA = +25°C -25 +25 nA FB Dual ModeTM Threshold VFB rising or falling 50 100 150 mV LX Switch Minimum Off-Time tOFF(MIN) 0.2 0.4 0.6 µs LX Switch Maximum On-Time tON(MAX) VFB = 1.3V 7 10 13 µs LX Switch On-Resistance RLX VIN = 6V 1.1 2 Ω MAX1836 250 312 450 LX Current Limit ILIM mA MAX1837 500 625 850 LX Zero-Crossing Threshold -75 +75 mV Dual Mode is a trademark of Maxim Integrated Products, Inc. www.maximintegrated.com Maxim Integrated │ 2