LTC3256

RECOMMENDED FOR NEW DESIGNS

Wide VIN Range Dual Output 350mA Step-Down Charge Pump with Watchdog Timer

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Part Models
8
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Part Details

  • Input Voltage Range: 5.5V to 38V
  • Independently Enabled 5V and 3.3V Fixed Outputs
  • 5V Output: 100mA Max
  • 3.3V LDO Output: 250mA Max
  • Multimode Step-Down Charge Pump (2:1, 1:1) with Automatic Mode Switching
  • Low Quiescent Current
    • 20μA with Both Outputs Regulating (No Load)
    • 0.5μA in Shutdown
  • Engineered for Diagnostic Coverage in ISO26262 Systems
  • 1.1V Reference Output for System Diagnostics
  • Power-On Reset and Watchdog Controller with Adjustable Timing
  • Overcurrent Fault Protection on Each Output
  • Overtemperature Protection
  • 150°C Max Operating Junction Temperature
  • Thermally Enhanced 16-Lead MSOP Package
LTC3256
Wide VIN Range Dual Output 350mA Step-Down Charge Pump with Watchdog Timer
LTC3256 Typical Application Image 1 LTC3256 Typical Application Image 2 LTC3256 Package Image 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
High Voltage Hot Swap Controllers 1
LTC4380
RECOMMENDED FOR NEW DESIGNS Low Quiescent Current Surge Stopper
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Evaluation Kits

eval board
schematic 1
DC2375A

LTC3256 Demo Board | Dual Output Step-Down Charge Pump Plus LDO, 5.5V ≤ VIN ≤ 38V, VOUT1 = 5V @ 100mA, VOUT2 = 3.3V @ 250mA

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Product Details

Demonstration Circuit 2375A is a dual output 350mA step down charge pump with a post-regulator LDO and watchdog timer featuring the LTC3256EMSE. The LTC3256 operates with a wide input voltage range from 5.5V to 38V and is engineered for diagnostic coverage in ISO262262 systems. The LTC3256 can provide up to 350mA of output current from a 12V battery with 2W less power dissipation than 2 ideal linear regulators. The DC2375A was populated with automotive grade components for evaluation.


Because of the wide input operating range it is possible to exceed the specified operating junction temperature and even reach thermal shutdown with heavy loads. Please refer to the data sheet for additional information on the thermal limitations of the device.
DC2375A
LTC3256 Demo Board | Dual Output Step-Down Charge Pump Plus LDO, 5.5V ≤ VIN ≤ 38V, VOUT1 = 5V @ 100mA, VOUT2 = 3.3V @ 250mA
DC2375A - Demo Board Image

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