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LM5007

www.ti.com

SNVS252F –SEPTEMBER 2003–REVISED MARCH 2013

High Voltage (80V) Step Down Switching Regulator

Check for Samples: LM5007

FEATURES

DESCRIPTION

The LM5007 Step Down Switching Regulator features

• Integrated 80V, 0.7A N-Channel Buck Switch

all of the functions needed to implement low cost,

• Internal HV Vcc Regulator

efficient, Buck bias regulators. This high voltage

• No Control Loop Compensation Required

regulator contains an 80 V, 0.7A N-Channel Buck

Switch. The device is easy to apply and is provided in

• Ultra-Fast Transient Response

the VSSOP-8 and the thermally enhanced WSON-8

• On Time Varies Inversely with Line Voltage

packages. The regulator is based on a hysteretic

• Operating Frequency Nearly Constant with

control scheme using an on time inversely

Varying Line Voltage

proportional to V

. This feature allows the operating

frequency to remain relatively constant with load and

• Adjustable Output Voltage

input voltage variations. The hysteretic control

• Highly Efficient Operation

requires no control loop compensation, while

• Precision Reference

providing very fast load transient response. An

intelligent current limit is implemented in the LM5007

• Low Bias Current

with forced off time that is inversely proportional to

• Intelligent Current Limit Protection

OUT

. This current limiting scheme reduces load

• Thermal Shutdown

current foldback. Additional protection features

include: Thermal Shutdown, Vcc undervoltage

• External Shutdown Control

lockout, gate drive undervoltage lockout, and Max

• VSSOP-8 and WSON-8 (4mm x 4mm) Packages

Duty Cycle limiter.

APPLICATIONS

• Non-Isolated Buck Regulator

• Secondary High Voltage Post Regulator

• +42V Automotive Systems

Connection Diagram

Figure 1. 8-Lead VSSOP or WSON

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 (17 pages)

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LM5007 www.ti.com SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 High Voltage (80V) Step Down Switching Regulator Check for Samples: LM5007 FEATURES DESCRIPTION • • • • • • The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80 V, 0.7A N-Channel Buck Switch. The device is easy to apply and is provided in the VSSOP-8 and the thermally enhanced WSON-8 packages.
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LM5007 SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 www.ti.com Typical Application Circuit and Block Diagram 7V SERIES REGULATOR 12 -75V VCC 7 VIN C5 0.1 P, 100V C1 1P LM5007 8 SD C3 0.1 P THERMAL SHUTDOWN UVLO ON TIMER START R1 200k COMPLETE 6 SD / RON BST Ron START OVER-VOLTAGE COMPARATOR SHUTDOWN + - 2.875V UVLO 300nS MIN OFF TIMER 2 VIN SD C4 0.01P DRIVER COMPLETE LEVEL SHIFT 2.
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LM5007 www.ti.com SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) VIN to GND 80V BST to GND 94V SW to GND (Steady State) -1V ESD Rating, Human Body Model (2) 2kV Machine Model 200V BST to VCC 80V BST to SW 14V VCC to GND 14V All Other Inputs to GND -0.
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LM5007 SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 www.ti.com Electrical Characteristics Specifications with standard typeface are for TJ = 25°C, and those with boldface type apply over full Operating Junction Temperature range. VIN = 48V, unless otherwise stated (1). Symbol Parameter Conditions Min Typ Max Unit 6.6 7 7.4 V Startup Regulator VCC Reg VCC Regulator Output VCC Current Limit (2) 11 mA VCC undervoltage Lockout Voltage (VCC increasing) 6.
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LM5007 www.ti.com SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 DETAILED OPERATING DESCRIPTION The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80V, 0.7A N-Channel Buck Switch. The device is easy to apply and is provided in the VSSOP-8 and the thermally enhanced WSON-8 packages. The regulator is based on a hysteretic control scheme using an on time inversely proportional to Vin.
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LM5007 SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 www.ti.com High Voltage Bias Regulator The LM5007 contains an internal high voltage bias regulator. The input pin (Vin) can be connected directly to line voltages from 9 V to 75 V. To avoid supply voltage transients due to long lead inductances on the input pin (Vin Pin 8), it is always recommended to connect low ESR ceramic chip capacitor (≊ 0.1µF) between "Vin" pin and "RTN" pin (pin 4), located close to LM5007.
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LM5007 www.ti.com SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 Over-Voltage Comparator The over-voltage comparator is provided to protect the output from overvoltage conditions due to sudden input line voltage changes or output loading changes. The over-voltage comparator monitors the FB pin versus an internal 2.875V reference (OV_REF). If the voltage at FB rises above OV_REF the comparator immediately terminates the buck switch on time pulse.
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LM5007 SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 www.ti.com Applications utilizing low resistance inductors and/or a low voltage drop rectifier may require special evaluation at high line, short circuit conditions. In this special case the preset 17µs (FB = 0V) off time may be insufficient to balance the inductor volt*time product.
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LM5007 www.ti.com SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 20 100 95 18 VIN = 15V 600k 16 14 85 80 (Ps) T OFF EFFICIENCY (%) 90 VIN = 30V VIN = 50V 75 VIN = 70V 400k 200k 12 10 8 6 70 4 65 2 60 0 0 0.1 0.2 0.3 0.4 100k 0 0.5 50k 0.5 1 V LOAD (A) Figure 7. LM5007 10V Output Efficiency 1.5 FB 2 2.5 (V) Figure 8. Current Limit VFB vs TOFF RCL = 50k -600k 5 4.5 4 (us) T ON 3.5 3 2.5 300k 2 200k 1.5 100k 1 0.
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LM5007 SNVS252F – SEPTEMBER 2003 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision E (March 2013) to Revision F • 10 Page Changed layout of National Data Sheet to TI format ............................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 14-Feb-2014 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-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) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM5007SD WSON NGT 8 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 LM5007SD/NOPB WSON NGT 8 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 LM5007SDX/NOPB WSON NGT 8 4500 330.0 12.4 4.3 4.3 1.3 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM5007SD WSON NGT 8 1000 210.0 185.0 35.0 LM5007SD/NOPB WSON NGT 8 1000 210.0 185.0 35.0 LM5007SDX/NOPB WSON NGT 8 4500 367.0 367.0 35.
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MECHANICAL DATA NGT0008A SDC08A (Rev A) www.ti.
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