LM3880 3 Rail Simple Power Sequencer with Fixed Time Delay | TI.com

LM3880 (ACTIVE) 3 Rail Simple Power Sequencer with Fixed Time Delay

3 Rail Simple Power Sequencer with Fixed Time Delay - LM3880
Datasheet
 

Description

The LM3880 simple power supply sequencer offers the easiest method to control power up sequencing and power down sequencing of multiple Independent voltage rails. By staggering the startup sequence, it is possible to avoid latch conditions or large in-rush currents that can affect the reliability of the system.

Available in a 6-pin SOT-23-6 package, the Simple Sequencer contains a precision enable pin and three open-drain output flags. The open-drain output flags permit that they can be pulled up to distinct voltage supplies separate from the sequencer VDD (so long as they do not exceed the recommended maximum voltage of 0.3V greater than VDD), so as to interface with ICs requiring a range of different enable signals. When the LM3880 is enabled, the three output flags will sequentially release, after individual time delays, thus permitting the connected power supplies to start up. The output flags will follow a reverse sequence during power down to avoid latch conditions.

EPROM capability allows every delay and sequence to be fully adjustable. Contact Texas Instruments if a nonstandard configuration is required.

Features

  • Qualified for Automotive Applications
  • Simple Solution for Sequencing 3 Voltage Rails from a Single Input Signal
  • Easily Cascade up to 3 Devices to Sequence as Many as 9 Voltage Rails
  • Power-Up and Power-Down Control
  • Tiny 2.9-mm x 1.9-mm Footprint
  • Low Quiescent Current of 25 µA
  • Input Voltage Range of 2.7 V to 5.5 V
  • Standard Timing Options Available

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Design with LM3880

  Range
Vcc  V 2.70 to 5.50V
Number of Flags
Flag Delay  ms

Parametrics

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Part number Order VCC (Min) (V) VCC (Max) (V) Iq (Typ) (uA) Time delay (ms) Number of sequenced outputs Rating Package Group Package size: mm2:W x L (PKG)
LM3880 Order now 2.7     5.5     25     2
10
16
30
60
120    
3     Catalog     SOT-23 | 6     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
LM3880-Q1 Order now 2.7     5.5     25     2
10
16
30
60
120    
3     Automotive     SOT-23 | 6     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
LM3881 Order now 2.7     5.5     80     Adjustable     3     Catalog     VSSOP | 8     8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)