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VIN

RT GND

LM5001

VCC

COMP

+12V to +36V +48V

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LM5001

LM5001-Q1

SNVS484G –JANUARY 2007–REVISED APRIL 2014

LM5001x High-Voltage Switch-Mode Regulator

1 Features 3 Description

The LM5001 high-voltage switch-mode regulator

• AEC-Q100 Qualified (T

= –40°C to 125°C)

features all of the functions necessary to implement

• Integrated 75-V N-Channel MOSFET

efficient high-voltage Boost, Flyback, SEPIC and

• Ultra-Wide Input Voltage Range from

Forward converters, using few external components.

3.1 V to 75 V

This easy-to-use regulator integrates a 75-V N-

Channel MOSFET with a 1-A peak current limit.

• Integrated High Voltage Bias Regulator

Current mode control provides inherently simple loop

• Adjustable Output Voltage

compensation and line-voltage feed-forward for

• 1.5% Output Voltage Accuracy

superior rejection of input transients. The switching

frequency is set with a single resistor and is

• Current Mode Control with Selectable

programmable up to 1.5 MHz. The oscillator can also

Compensation

be synchronized to an external clock. Additional

• Wide Bandwidth Error Amplifier

protection features include: current limit, thermal

• Integrated Current Sensing and Limiting

shutdown, undervoltage lockout and remote

shutdown capability.

• Integrated Slope Compensation

• 85% Maximum Duty Cycle Limit

Device Information

(1)

• Single Resistor Oscillator Programming

DEVICE NAME PACKAGE BODY SIZE

• Oscillator Synchronization Capability

SOIC (8) 4.9 mm x 3.91 mm

LM5001

• Enable / Undervoltage Lockout (UVLO) Pin

WSON (8) 4 mm x 4 mm

• Thermal Shutdown

LM5001Q1 SOIC (8) 4.9 mm x 3.91 mm

(1) For all available packages, see the orderable addendum at

2 Applications

the end of the datasheet.

• DC-DC Power Supplies for Industrial,

Communications, and Automotive Applications

• Boost, Flyback, SEPIC and Forward Converter

Topologies

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Summary of content (26 pages)

PAGE 1
Product Folder Sample & Buy Support & Community Tools & Software Technical Documents LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 LM5001x High-Voltage Switch-Mode Regulator 1 Features 3 Description • • • The LM5001 high-voltage switch-mode regulator features all of the functions necessary to implement efficient high-voltage Boost, Flyback, SEPIC and Forward converters, using few external components.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications.....................................
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 5 Pin Configuration and Functions SOIC (D) 8 Pins Top View SW 1 8 EN VIN 2 7 COMP VCC 3 6 FB GND 4 5 RT WSON (NGT) 8 Pins Top View COMP 1 EN 2 8 FB 7 RT EP SW 3 6 GND VIN 4 5 VCC Pin Functions PIN SOIC WSON 1 3 2 4 NAME TYPE DESCRIPTION SW Switch pin The drain terminal of the internal power MOSFET. VIN Input supply pin Nominal operating range: 3.1 V to 75 V.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) MIN VIN to GND SW to GND (Steady State) –0.3 VCC, EN to GND COMP, FB, RT to GND –0.3 Maximum Junction Temperature MAX UNIT 76 V 76 V 14 V 7 V 150 °C 6.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 Electrical Characteristics (continued) Minimum and Maximum limits are ensured through test, design, or statistical correlation, over the junction temperature (TJ) range of –40°C to +125°C. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. VVIN = 10 V, RRT = 48.7 kΩ unless otherwise stated(1). SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX VEN increasing 0.25 0.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com 6.6 Typical Characteristics 6 Figure 1. Efficiency, Boost Converter Figure 2. VFB vs Temperature Figure 3. IQ (Non-Switching) vs VIN Figure 4. VCC vs VIN Figure 5. RDS(ON) vs VCC Figure 6.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 Typical Characteristics (continued) Figure 7. ILIM vs VCC Figure 8. ILIM vs VCC vs Temperature Figure 9. FSW vs RRT Figure 10. FSW vs Temperature Figure 11. FSW vs VCC Figure 12.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com 7 Detailed Description 7.1 Overview The LM5001 high voltage switching regulator features all the functions necessary to implement an efficient boost, flyback, SEPIC or forward current mode power converter. The operation can be best understood by referring to the block diagram. At the start of each cycle, the oscillator sets the driver logic and turns on the power MOSFET to conduct current through the inductor or transformer.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 7.3 Feature Description 7.3.1 High-Voltage VCC Regulator The LM5001 VCC Low Drop Out (LDO) regulator allows the LM5001 to operate at the lowest possible input voltage. The VCC pin voltage is very nearly equal to the input voltage from 2.8 V up to approximately 6.9 V. As the input voltage continues to increase, the VCC pin voltage is regulated at the 6.9 V set-point. The total input operating range of the VCC LDO regulator is 3.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com Feature Description (continued) An external set-point resistor divider from VIN to GND can be used to determine the minimum operating input range of the regulator. The divider must be designed such that the EN pin exceeds the 1.26 V standby threshold when VIN is in the desired operating range. The internal 6 µA current source should be included when determining the resistor values.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 Feature Description (continued) The current sense signal is reduced to a scale factor of 1.05 V/A for the PWM comparator signal. The signal is then summed with a 450 mV peak slope compensation ramp. The combined signal provides the PWM comparator with a control signal that reaches 1.5 V when the MOSFET current is 1 A.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com Application Information (continued) VPWR 10 VIN LM5001 0.1 PF Figure 14. Input Transient Protection 8.1.2 SW Pin Attention must be given to the PC board layout for the SW pin which connects to the power MOSFET drain. Energy can be stored in parasitic inductance and capacitance which cause switching spikes that negatively effect efficiency, and conducted and radiated emissions.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 Application Information (continued) VPWR LM5001 VIN 6 PA R1 1.26V Disable PWM Controller EN 0.45V R2 Disable VCC Regulator Figure 15. Basic EN (UVLO) Configuration Remote configuration of the controller’s operational modes can be accomplished with open drain device(s) connected to the EN pin as shown in Figure 16. A MOSFET or an NPN transistor connected to the EN pin can force the regulator into the low power ‘off’ state.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com Application Information (continued) VCC 5V VOUT 1.26V PWM 5k FB 1.3V COMP SHUTDOWN & STANDBY RSS SOFT-START CAPACITOR LM5001 Figure 17. Soft-Start 8.2 Typical Applications Figure 18, Figure 19, Figure 20, Figure 21, and Figure 22 present examples of a Non-Isolated Flyback, Isolated Flyback, Boost, 24-V SEPIC and a 12-V Automotive range SEPIC converters utilizing the LM5001 switching regulator. 8.2.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 Typical Applications (continued) T1 VCC VIN = 16V ± 42V D1 LPRI = 160 PH 8:3:2 D2 VOUT = 5V C1 4.7 PF IOUT = 1A C4 100 PF C5 220 pF R1 60.4k EN R2 6.04k C2 100 pF R3 52.3k C6 4700 pF LM5001 VIN EN RT GND SW COMP FB VCC R5 10.2k R4 13.0k VCC C3 1 PF R6 3.40k R7 100k C7 10 PF SYNC Figure 18. Non-Isolated Flyback 8.2.2 Isolated Flyback The Isolated Flyback converter (Figure 19) utilizes a 2.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com Typical Applications (continued) L1 100 PH VIN = 16V ± 36V D2 VOUT = 48V IOUT = 150mA C1 4.7 éF C3 10éF R1 60.4k R3 52.3k C4 2200 pF LM5001 R2 6.04k VIN EN RT GND SW COMP FB VCC R4 73.2k R5 54.9k R6 1.47k C2 1 éF Figure 20. Boost 8.2.4 24-V SEPIC The 24-V SEPIC converter (Figure 21) utilizes the internal voltage reference for the regulation setpoint.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 Typical Applications (continued) L1 100 PH VIN = 3.1V ± 60V C3 4.7 PF C1 2.2 éF D2 L2 100 PH VOUT = 12V IOUT = 50 mA C6 22 éF C4 150 pF R1 15.8k C5 0.015 PF LM5001 NC VIN EN RT GND SW COMP FB VCC R2 11.5k C2 1 PF R3 11.5k R4 1.33k Figure 22.
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LM5001, LM5001-Q1 SNVS484G – JANUARY 2007 – REVISED APRIL 2014 www.ti.com 9 Layout 9.1 Layout Guidelines The LM5001 Current Sense and PWM comparators are very fast and may respond to short duration noise pulses. The components at the SW, COMP, EN and the RT pins should be as physically close as possible to the IC, thereby minimizing noise pickup on the PC board tracks.
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LM5001, LM5001-Q1 www.ti.com SNVS484G – JANUARY 2007 – REVISED APRIL 2014 10 Device and Documentation Support 10.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 1.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 17-May-2014 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device LM5001IDRQ1 Package Package Pins Type Drawing SOIC SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM5001MAX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM5001SD WSON NGT 8 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM5001IDRQ1 SOIC D 8 2500 367.0 367.0 35.0 LM5001MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM5001SD WSON NGT 8 1000 210.0 185.0 35.0 LM5001SD/NOPB WSON NGT 8 1000 210.0 185.0 35.0 LM5001SDE/NOPB WSON NGT 8 250 210.0 185.0 35.0 LM5001SDX/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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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.