MAX1837EUT33-T 24V Internal Switch Integrated Circuit Chip 100 Duty Cycle Step Down Converters
integrated circuit ic
,integrated circuit components
♦ 4.5V to 24V Input Voltage Range
♦ Preset 3.3V or 5V Output
♦ Adjustable Output from 1.25V to VIN
♦ Output Currents Up to 125mA (MAX1836) or 250mA (MAX1837)
♦ Internal P-Channel MOSFET
♦ Efficiency Over 90%
♦ 12µA Quiescent Current
♦ 3µA Shutdown Current
♦ 100% Maximum Duty Cycle for Low Dropout
♦ Current-Limiting and Overtemperature Protection
♦ Small 6-Pin SOT23 Package
General Description
The MAX1836/MAX1837 high-efficiency step-down converters provide a preset 3.3V or 5V output voltage from supply voltages as high as 24V. Using external feedback resistors, the output voltage may be adjusted from 1.25V to VIN. An internal current-limited switching MOSFET delivers load currents up to 125mA (MAX1836) or 250mA (MAX1837).
The unique current-limited control scheme, operating with duty cycles up to 100%, minimizes the dropout voltage (120mV at 100mA). Additionally, this control scheme reduces supply current under light loads to 12µA. High switching frequencies allow the use of tiny surface-mount inductors and output capacitors.
The MAX1836/MAX1837 step-down converters with internal switching MOSFETs are available in a 6-pin SOT23 package, making them ideal for low-cost, lowpower, space-sensitive applications. For increased output drive capability, use the MAX1776 step-down converter that uses an internal 24V switch to deliver up to 500mA. For even higher currents, use the MAX1626/ MAX1627 step-down controllers that drive a
Typical Operating Characteristics
STOCK LIST
| TLC3544IPW | 848 | TI | 08+ | TSSOP-20 |
| TXB0108PWR | 21556 | TI | 16+ | TSSOP-20 |
| TXS0108EPWR | 16024 | TI | 16+ | TSSOP-20 |
| TD62083AFNG | 18556 | TOSHIBA | 15+ | TSSOP-18 |
| SN65C3221PWR | 25416 | TI | 10+ | TSSOP-16 |
| SN74HC151PWR | 17294 | TI | 16+ | TSSOP-16 |
| SN74HC153PWR | 13604 | TI | 10+ | TSSOP-16 |
| SN74HC157PWR | 41500 | TI | 09+ | TSSOP-16 |
| SN74LV165APWR | 15332 | TI | 14+ | TSSOP-16 |
| SN74LV4051APWR | 14414 | TI | 10+ | TSSOP-16 |
| SN74LV4051ATPWRQ1 | 45956 | TI | 04+ | TSSOP-16 |
| SN74LVC157APWR | 13712 | TI | 10+ | TSSOP-16 |
| TLV2375IPWR | 4748 | TI | 10+ | TSSOP-16 |
| TPS40055PWPR | 2588 | TI | 16+ | TSSOP-16 |
| TPS40061PWP | 2588 | TI | 16+ | TSSOP-16 |
| TS3A44159PWR | 16988 | TI | 14+ | TSSOP-16 |
| TSC2046IPWR | 15296 | TI | 14+ | TSSOP-16 |
| TXB0106PWR | 6954 | TI | 16+ | TSSOP-16 |
| UCC2893PW | 8538 | TI | 16+ | TSSOP-16 |
| ULN2003AIPWR | 5296 | TI | 13+ | TSSOP-16 |
| TA1372FNG | 32952 | TOSHIBA | 14+ | TSSOP-16 |
| WM8524GEDT/R | 13488 | WOLFSON | 16+ | TSSOP-16 |
| SN74AC08PWR | 13568 | TI | 14+ | TSSOP-14 |
| SN74AHC08PWR | 75000 | TI | 16+ | TSSOP-14 |
| SN74ALVC00PWR | 12328 | TI | 16+ | TSSOP-14 |
| SN74HC08PWR | 38000 | TI | 15+ | TSSOP-14 |
| SN74HC125PWR | 17456 | TI | 14+ | TSSOP-14 |
| SN74HC74PWR | 55000 | TI | 14+ | TSSOP-14 |
| SN74LV05APWR | 31000 | TI | 04+ | TSSOP-14 |
| SN74LV07APWR | 17492 | TI | 13+ | TSSOP-14 |