Datasheet MAX1836, MAX1837 (Maxim) - 4
| Manufacturer | Maxim |
| Description | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| Pages / Page | 15 / 4 — Electrical Characteristics (continued). TA = -40°C to +85°C. PARAMETER. … |
| File Format / Size | PDF / 2.1 Mb |
| Document Language | English |
Electrical Characteristics (continued). TA = -40°C to +85°C. PARAMETER. SYMBOL. CONDITIONS. MIN. TYP. MAX. UNITS. Note 2:. Note 3:. Note 4:
Model Line for this Datasheet
Text Version of Document
MAX1836/MAX1837 24V Internal Switch, 100% Duty Cycle, Step-Down Converters
Electrical Characteristics (continued)
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN,
TA = -40°C to +85°C
, unless otherwise noted.) (Note 4)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LX Zero-Crossing Threshold -75 +75 mV Shutdown Input Threshold VSHDN VIN = 4.5V to 24V (Note 3) 0.8 2.4 V Shutdown Leakage Current ISHDN VSHDN = 0 or 24V -1 +1 µA
Note 2:
When using the shutdown input, the maximum output voltage allowed with external feedback is 5.5V. If the output voltage is set above 5.5V, connect shutdown to the input.
Note 3:
Shutdown input minimum slew rate (rising or falling) is 10V/ms.
Note 4:
Specifications to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN, TA = +25°C.)
MAX1836EUT33 MAX1836EUT33 MAX1837EUT33 OUTPUT VOLTAGE vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT OUTPUT VOLTAGE vs. LOAD CURRENT
3.33 100 3.33 FIGURE 1 FIGURE 1 FIGURE 2 3.32 95 VOUT = 3.3V 3.32 VIN = 5V MAX1836/7 toc01 MAX1836/7 toc02 VIN = 5V MAX1836/7 toc03 VIN = 9V 3.31 90 3.31 VIN = 9V VIN = 5V 3.30 85 3.30 VIN = 12V EFFICIENCY (%) 3.29 VIN = 9V to 12V 80 3.29 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) VIN = 12V 3.28 75 3.28 3.27 70 3.27 0 50 100 150 200 0.1 1 10 100 1000 0 50 100 150 200 250 300 350 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA)
MAX1837EUT33 MAX1837EUT33 MAX1837EUT33 EFFICIENCY vs. LOAD CURRENT SWITCHING FREQUENCY vs. LOAD CURRENT OUTPUT VOLTAGE vs. INPUT VOLTAGE
100 180 3.33 FIGURE 2 FIGURE 2 I V 160 OUT = 10mA 95 OUT = 3.3V VOUT = 3.3V VIN = 9V 3.32 MAX1836/7 toc04 140 MAX1836/7 toc05 MAX1836/7 toc06 90 VIN = 5V 120 VIN = 12V 3.31 IOUT = 200mA VIN = 9V 100 85 3.30 80 EFFICIENCY (%) 80 FREQUENCY (kHz) 60 3.29 OUTPUT VOLTAGE (V) 40 75 3.28 FIGURE 2 20 VIN = 5V VOUT = 3.3V VIN = 12V L1 = 47µH 70 0 3.27 0.1 1 10 100 1000 0 50 100 150 200 250 300 350 0 4 8 12 16 20 24 LOAD CURRENT (mA) LOAD CURRENT (mA) INPUT VOLTAGE (V) www.maximintegrated.com Maxim Integrated │ 4
Electrical Characteristics (continued)
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN,
TA = -40°C to +85°C
, unless otherwise noted.) (Note 4)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LX Zero-Crossing Threshold -75 +75 mV Shutdown Input Threshold VSHDN VIN = 4.5V to 24V (Note 3) 0.8 2.4 V Shutdown Leakage Current ISHDN VSHDN = 0 or 24V -1 +1 µA
Note 2:
When using the shutdown input, the maximum output voltage allowed with external feedback is 5.5V. If the output voltage is set above 5.5V, connect shutdown to the input.
Note 3:
Shutdown input minimum slew rate (rising or falling) is 10V/ms.
Note 4:
Specifications to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN, TA = +25°C.)
MAX1836EUT33 MAX1836EUT33 MAX1837EUT33 OUTPUT VOLTAGE vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT OUTPUT VOLTAGE vs. LOAD CURRENT
3.33 100 3.33 FIGURE 1 FIGURE 1 FIGURE 2 3.32 95 VOUT = 3.3V 3.32 VIN = 5V MAX1836/7 toc01 MAX1836/7 toc02 VIN = 5V MAX1836/7 toc03 VIN = 9V 3.31 90 3.31 VIN = 9V VIN = 5V 3.30 85 3.30 VIN = 12V EFFICIENCY (%) 3.29 VIN = 9V to 12V 80 3.29 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) VIN = 12V 3.28 75 3.28 3.27 70 3.27 0 50 100 150 200 0.1 1 10 100 1000 0 50 100 150 200 250 300 350 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA)
MAX1837EUT33 MAX1837EUT33 MAX1837EUT33 EFFICIENCY vs. LOAD CURRENT SWITCHING FREQUENCY vs. LOAD CURRENT OUTPUT VOLTAGE vs. INPUT VOLTAGE
100 180 3.33 FIGURE 2 FIGURE 2 I V 160 OUT = 10mA 95 OUT = 3.3V VOUT = 3.3V VIN = 9V 3.32 MAX1836/7 toc04 140 MAX1836/7 toc05 MAX1836/7 toc06 90 VIN = 5V 120 VIN = 12V 3.31 IOUT = 200mA VIN = 9V 100 85 3.30 80 EFFICIENCY (%) 80 FREQUENCY (kHz) 60 3.29 OUTPUT VOLTAGE (V) 40 75 3.28 FIGURE 2 20 VIN = 5V VOUT = 3.3V VIN = 12V L1 = 47µH 70 0 3.27 0.1 1 10 100 1000 0 50 100 150 200 250 300 350 0 4 8 12 16 20 24 LOAD CURRENT (mA) LOAD CURRENT (mA) INPUT VOLTAGE (V) www.maximintegrated.com Maxim Integrated │ 4
