LM51501-Q1 Wide VIN Automotive Low IQ Boost Controller | TI.com

LM51501-Q1
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Wide VIN Automotive Low IQ Boost Controller

 

Description

The LM51501-Q1 device is a wide input range automatic boost controller. The device can be used to maintain a stable output voltage during automotive cranking from a vehicle battery or from a back-up battery.

The LM51501-Q1 switching frequency is programmed by a resistor from 220 kHz to 2.3 MHz. Fast switching (≥ 2.2-MHz) minimizes AM band interference and allows for a small solution size and fast transient response.

The LM51501-Q1 operates in low IQ standby mode when the input or output voltage is above the preset standby thresholds and automatically wakes up when the output voltage drops below the preset wake-up threshold.

The device transitions in and out of the low IQ standby mode to extend battery life at light load. A single resistor programs the target output regulation voltage as well as the configuration. Additional features include low shutdown current, boost status indicator, adjustable cycle-by-cycle current limit, and thermal shutdown. Status indicator can be used to control a circuit to bypass the diode when the part is not boosting in order to reduce power dissipation. In E-call mode, it can be used to control a disconnect switch to protect the back-up-battery.

Features

  • AEC-Q100 Qualified:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • Wide VIN Input Range From 1.5 V to 42 V When VOUT ≥ 5 V (65-V Absolute Maximum)
  • Low Shutdown Current (IQ ≤ 5 µA)
  • Low Standby Current (IQ ≤ 15 µA)
  • Four Programmable Output Voltage Options and Two Selectable Configurations
    • 6.0 V, 6.5 V, 9.5 V, or 11.5 V
    • Start-Stop or E-Call Configurations
  • Adjustable Switching Frequency From 220 kHz to 2.3 MHz
  • Automatic Wake-Up and Standby Mode Transition
  • Optional Clock Synchronization
  • Boost Status Indicator
  • 1.5-A Peak MOSFET Gate Driver
  • Adjustable Cycle-by-Cycle Current Limit
  • Thermal Shutdown
  • 16-Pin WQFN With Wettable Flanks
  • Create a Custom Design Using the LM51501-Q1 With the WEBENCH® Power Designer

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WEBENCH® Designer LM51501-Q1

  Min   Max Range
Vin  V 1.5 to 42.0V
Vout  V 6 to 11.5V
Iout  A ≤ 7.35A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Type Package Group
LM51501-Q1 Order now 1.5     42     6.0     11.5     1     220     2300     0.015     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency    
87     -40 to 125     Automotive     Controller     WQFN | 16    
LM25122-Q1 Order now 3     42     3     50     1     50     600     4     Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification    
100     -40 to 125     Automotive     Controller     HTSSOP | 20    
LM3481-Q1 Order now 2.97     48     1.275     500     1     100     1000     3.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable    
85     -40 to 125     Automotive     Controller     VSSOP | 10    
LM5122-Q1 Order now 3     65     3     100     1     50     1000     4     Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification
UVLO Adjustable    
100     -40 to 125     Automotive     Controller     HTSSOP | 20    
LM5150-Q1 Order now 1.5     42     6.8     10.5     1     220     2300     0.015     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency    
87     -40 to 150     Automotive     Controller     WQFN | 16    
TPS40210-Q1 Order now 4.5     52     6.4     300     1     35     1000     0.53     Enable
Frequency Synchronization    
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