Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - power supply controllers/monitors 25 µA SOT 23 6

GND

VCC

FLAG 1

FLAG 2

FLAG 3

Enable

Power Supply 1

Power Supply 2

Power Supply 3

Input

Supply

Enable

LM3880, LM3880Q-1

www.ti.com

SNVS451I –AUGUST 2006–REVISED MARCH 2013

LM3880/LM3880Q-1 Power Sequencer

Check for Samples: LM3880, LM3880Q-1

FEATURES

DESCRIPTION

The LM3880 Power Sequencer offers the easiest

• Easiest Method to Sequence Rails

method to control power up and power down of

• Power Up and Power Down Control

multiple power supplies (switchers or linear

• Input Voltage Range of 2.7V to 5.5V

regulators). By staggering the startup sequence, it is

possible to avoid latch conditions or large in-rush

• Small Footprint SOT-23-6

currents that can affect the reliability of the system.

• Low Quiescent Current of 25 µA

Available in a SOT-23-6 package, the Power

• Standard Timing Options Available

Sequencer contains a precision enable pin and three

• Customization of Timing and Sequence

open drain output flags. Upon enabling the LM3880

Available through Factory Programmability

the three output flags will sequentially release, after

• LM3880Q is AEC-Q100 Grade 1 Qualified and

individual time delays, permitting the connected

power supplies to startup. The output flags will follow

is Manufactured on an Automotive Grade Flow

a reverse sequence during power down to avoid latch

conditions.

APPLICATIONS

EPROM capability allows every delay and sequence

• Multiple Supply Sequencing

to be fully adjustable. Contact Texas Instruments if a

• Microprocessor / Microcontroller Sequencing

non-standard configuration is required.

• FPGA Sequencing

• Automotive

Typical Application Circuit

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (22 pages)

PAGE 1
LM3880, LM3880Q-1 www.ti.com SNVS451I – AUGUST 2006 – REVISED MARCH 2013 LM3880/LM3880Q-1 Power Sequencer Check for Samples: LM3880, LM3880Q-1 FEATURES DESCRIPTION • • • • • • • The LM3880 Power Sequencer offers the easiest method to control power up and power down of multiple power supplies (switchers or linear regulators). 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.
PAGE 2
LM3880, LM3880Q-1 SNVS451I – AUGUST 2006 – REVISED MARCH 2013 www.ti.com Connection Diagram 1 2 3 VCC FLAG1 6 GND FLAG2 EN FLAG3 4 5 Figure 1. Top View SOT-23–6 Package PIN DESCRIPTIONS Pin # Name Function 1 VCC Input supply 2 GND Ground 3 EN Precision enable pin 4 FLAG3 Open drain output #3 5 FLAG2 Open drain output #2 6 FLAG1 Open drain output #1 Table 1.
PAGE 3
LM3880, LM3880Q-1 www.ti.com SNVS451I – AUGUST 2006 – REVISED MARCH 2013 Absolute Maximum Ratings (1) (2) −0.3V to +6.0V VCC −0.3V to 6.0V EN, FLAG1, FLAG2, FLAG3 Max Flag 'ON' Current 50 mA −65°C to +150°C Storage Temperature Range Junction Temperature 150°C Lead Temperature (Soldering, 5 sec.) 260°C Minimum ESD Rating (1) (2) ±2 kV Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
PAGE 4
LM3880, LM3880Q-1 SNVS451I – AUGUST 2006 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (continued) Specifications with standard typeface are for TJ = 25°C, and those in bold face type apply over the full Operating Temperature Range (TJ = -40°C to +125°C). Minimum and Maximum limits are specified through test, design or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C and are provided for reference purposes only. VCC = 3.
PAGE 5
LM3880, LM3880Q-1 www.ti.com SNVS451I – AUGUST 2006 – REVISED MARCH 2013 Typical Performance Characteristics Quiescent Current vs VCC Quiescent Current vs Temperature (VCC = 3.3V) 30 26 29 25 28 24 26 IQ (PA) IQ (PA) 27 25 23 24 22 23 22 21 21 20 2.5 3 3.5 4 4.5 5 5.5 20 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (oC) VCC (V) Figure 2. Figure 3. Enable Threshold vs Temperature Time Delay (30ms) vs VCC 1.232 1.230 1.228 VEN (V) 1.226 1.224 RISING FALLING 1.222 1.
PAGE 6
LM3880, LM3880Q-1 SNVS451I – AUGUST 2006 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) 6 FLAG VOL vs VCC (RFLAG = 100 kΩ) FLAG Voltage vs Current Figure 8. Figure 9.
PAGE 7
LM3880, LM3880Q-1 www.ti.com SNVS451I – AUGUST 2006 – REVISED MARCH 2013 Block Diagram VCC FLAG1 7 PA td1 + - EN td2 FLAG2 Timing Delay Generation 1.25V td3 td4 Sequence Control td5 td6 Master Clock FLAG3 EPROM (Factory Set) GND Figure 10.
PAGE 8
LM3880, LM3880Q-1 SNVS451I – AUGUST 2006 – REVISED MARCH 2013 www.ti.com Timing Diagrams (Sequence 1) All standard options use this sequence for output flags rise and fall order. EN FLAG1 FLAG2 FLAG3 td1 td2 td3 Figure 11. Power Up Sequence EN FLAG1 FLAG2 FLAG3 td4 td5 td6 Figure 12.
PAGE 9
LM3880, LM3880Q-1 www.ti.com SNVS451I – AUGUST 2006 – REVISED MARCH 2013 APPLICATION INFORMATION OVERVIEW The LM3880 Power Sequencer provides an easy solution for sequencing multiple rails in a controlled manner. Six independent timers are integrated to control the timing sequence (power up and power down) of three open drain output flags. These flags permit connection to either a shutdown / enable pin of linear regulators and switchers to control the power supplies’ operation.
PAGE 10
LM3880, LM3880Q-1 SNVS451I – AUGUST 2006 – REVISED MARCH 2013 www.ti.com EN FLAG1 td1 Figure 14. EN Glitch If the enable signal remains high for the entire power-up sequence, then the part will operate as shown in the standard timing diagrams. However, if the enable signal is de-asserted before the power-up sequence is completed the part will enter a controlled shutdown. This allows the system to walk through a controlled power cycling, preventing any latch conditions from occuring.
PAGE 11
LM3880, LM3880Q-1 www.ti.com SNVS451I – AUGUST 2006 – REVISED MARCH 2013 CUSTOM SEQUENCER The LM3880 Power Sequencer is based on a CMOS process utilizing an EPROM that has the capability to be custom programmed at the factory. Approximately 500,000,000 different options are available allowing even the most complex system to be simply sequenced. Because of the vast options that are possible, customization is limited to orders of a certain quantity. Please contact Texas Instruments for more information.
PAGE 12
LM3880, LM3880Q-1 SNVS451I – AUGUST 2006 – REVISED MARCH 2013 Input www.ti.com EN FLAG1 Output FLAG2 Sequence 1 FLAG3 delay1 delay2 delay3 delay4 delay5 delay6 (td1) (td2) (td3) (td4) (td5) (td6) FLAG1 FLAG2 Sequence 2 FLAG3 FLAG1 FLAG2 Sequence 3 FLAG3 FLAG1 Sequence 4 FLAG2 FLAG3 FLAG1 FLAG2 Sequence 5 FLAG3 FLAG1 FLAG2 Sequence 6 FLAG3 Figure 16.
PAGE 13
LM3880, LM3880Q-1 www.ti.com SNVS451I – AUGUST 2006 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision H (March 2013) to Revision I • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 14
PACKAGE OPTION ADDENDUM www.ti.
PAGE 15
PACKAGE OPTION ADDENDUM www.ti.
PAGE 16
PACKAGE OPTION ADDENDUM www.ti.
PAGE 17
PACKAGE OPTION ADDENDUM www.ti.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 18-Dec-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) LM3880MF-1AA SOT-23 DBV 6 1000 178.0 8.4 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.2 3.2 1.4 4.0 8.0 Q3 LM3880MF-1AB/NOPB SOT-23 DBV 6 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LM3880MF-1AC/NOPB SOT-23 DBV 6 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 18-Dec-2013 Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM3880QMF-1AB/NOPB SOT-23 DBV 6 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LM3880QMF-1AC/NOPB SOT-23 DBV 6 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LM3880QMF-1AD/NOPB SOT-23 DBV 6 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LM3880QMF-1AE/NOPB SOT-23 DBV 6 1000 178.0 8.4 3.2 3.2 1.
PAGE 20
PACKAGE MATERIALS INFORMATION www.ti.com 18-Dec-2013 Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM3880MF-1AA SOT-23 DBV 6 1000 210.0 185.0 35.0 LM3880MF-1AB/NOPB SOT-23 DBV 6 1000 210.0 185.0 35.0 LM3880MF-1AC/NOPB SOT-23 DBV 6 1000 210.0 185.0 35.0 LM3880MF-1AD/NOPB SOT-23 DBV 6 1000 210.0 185.0 35.0 LM3880MF-1AE/NOPB SOT-23 DBV 6 1000 210.0 185.0 35.0 LM3880MF-1AF/NOPB SOT-23 DBV 6 1000 210.0 185.0 35.
PAGE 21
PAGE 22
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.