Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Holder WSON 10

VIN

BST

LM5010A

VCC

RON/SD

6V - 75V

Input

OUT

RTN

ISEN

SGND

SHUTDOWN

LM5010A

LM5010A-Q1

www.ti.com

SNVS376E –OCTOBER 2005–REVISED FEBRUARY 2013

High-Voltage 1-A Step-Down Switching Regulator

Check for Samples: LM5010A, LM5010A-Q1

FEATURES

APPLICATIONS

• Wide 6V to 75V Input Voltage Range

• Non-Isolated Telecommunications Regulator

• Valley Current Limiting At 1.25A • Secondary Side Post Regulator

• Programmable Switching Frequency Up To 1 • Automotive Electronics

MHz

DESCRIPTION

• Integrated 80V N-Channel Buck Switch

The LM5010A Step-Down Switching Regulator is an

• Integrated High Voltage Bias Regulator

enhanced version of the LM5010 with the input

• No Loop Compensation Required

operating range extended to 6V minimum. The

• Ultra-Fast Transient Response

LM5010A features all the functions needed to

implement a low cost, efficient, buck regulator

• Nearly Constant Operating Frequency With

capable of supplying in excess of 1A load current.

Line and Load Variations

This high voltage regulator integrates an N-Channel

• Adjustable Output Voltage

Buck Switch, and is available in thermally enhanced

• 2.5V, ±2% Feedback Reference

WSON-10 and HTSSOP-14 packages. The constant

on-time regulation scheme requires no loop

• Programmable Soft-Start

compensation resulting in fast load transient

• Thermal Shutdown

response and simplified circuit implementation. The

• LM5010AQ is AEC-Q100 Grade 1 and 0

operating frequency remains constant with line and

qualified

load variations due to the inverse relationship

between the input voltage and the on-time. The valley

• Packages

current limit detection is set at 1.25A. Additional

– WSON-10 (4 mm x 4 mm)

features include: VCC under-voltage lock-out, thermal

– HTSSOP-14

shutdown, gate drive under-voltage lock-out, and

maximum duty cycle limiter.

– Both Packages Have Exposed Thermal Pad

For Improved Heat Dissipation

Basic Step-Down Regulator

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 (27 pages)

PAGE 1
LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 High-Voltage 1-A Step-Down Switching Regulator Check for Samples: LM5010A, LM5010A-Q1 FEATURES APPLICATIONS • • • • • • 1 2 • • • • • • • • • • • Wide 6V to 75V Input Voltage Range Valley Current Limiting At 1.
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com Connection Diagram 1 2 3 4 SW VIN BST VCC ISEN RON/SD SGND SS RTN FB 5 10 1 9 2 8 3 7 4 6 5 6 7 14 NC NC SW VIN BST VCC ISEN RON/SD SGND SS RTN FB NC NC 13 12 11 10 9 8 Table 1. PIN DESCRIPTIONS Pin Number Name Description Application Information WSON-10 HTSSOP14 1 2 SW Switching Node Internally connected to the buck switch source.
PAGE 3
LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 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 RTN -0.3V to 76V BST to RTN -0.3V to 90V SW to RTN (Steady State) -1.5V BST to VCC 76V BST to SW 14V VCC to RTN -0.3V to 14V SGND to RTN -0.3V to +0.3V SS to RTN -0.
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com Electrical Characteristics (continued) Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction Temperature (TJ) range. 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.
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LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 Typical Performance Characteristics VCC vs VIN VCC vs ICC 10 8 VIN = 8V 7 8.0 VCC (V) VCC (V) VIN = 6V 5 6.0 4.0 VIN = 48V VIN = 9V 6 4 VCC UVLO 3 2 ICC = 0 mA 2.0 VCC Externally Loaded 1 0 FS = 400 kHz 0 0 1 2 3 4 5 6 7 8 9 10 0 3 6 12 15 ICC (mA) VIN (V) Figure 1. Figure 2.
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com BLOCK DIAGRAM Input 6V-75V LM5010A 7V BIAS REGULATOR VIN VIN SENSE C1 C5 VCC Q2 UVL BYPASS SWITCH VCC THERMAL SHUTDOWN C3 BST Gate Drive UVLO GND RON 0.7V ON TIMER START RON COMPLETE RON/SD 260 ns OFF TIMER START COMPLETE SD VIN C4 Q1 LEVEL SHIFT L1 DRIVER SW Shutdown Input Driver D1 CURRENT LIMIT COMPARATOR 2.5V 62.5 mV 11.
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LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 FUNCTIONAL DESCRIPTION VIN 7.0V UVLO VCC SW Pin Inductor Current 2.5V SS Pin VOUT t2 t1 Figure 7. Startup Sequence The LM5010A Step Down Switching Regulator features all the functions needed to implement a low cost, efficient buck DC-DC converter capable of supplying in excess of 1A to the load. This high voltage regulator integrates an 80V N-Channel buck switch, with an easy to implement constant on-time controller.
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com Control Circuit Overview The LM5010A employs a control scheme based on a comparator and a one-shot on-timer, with the output voltage feedback (FB) compared to an internal reference (2.5V). If the FB voltage is below the reference the buck switch is turned on for a time period determined by the input voltage and a programming resistor (RON).
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LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 The turn-on sequence is shown in Figure 7. When VCC exceeds the under-voltage lock-out threshold (UVLO) of 5.25V (t1 in Figure 7), the buck switch is enabled, and the SS pin is released to allow the soft-start capacitor (C6) to charge up. The output voltage VOUT is regulated at a reduced level which increases to the desired value as the soft-start voltage increases (t2 in Figure 7).
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com VOUT x 300 ns tON(min) = (VIN(min) ± VOUT) (8) Shutdown The LM5010A can be remotely shut down by forcing the RON/SD pin below 0.7V with a switch or open drain device. See Figure 9. In the shutdown mode the SS pin is internally grounded, the on-time one-shot is disabled, the input current at VIN is reduced, and the VCC bypass switch is turned off. The VCC regulator is not disabled in the shutdown mode.
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LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 IPK IOCL Inductor Current Current Limit Threshold Io 'I High Load Current Low Load Current Current Limited Normal Operation Figure 10. Inductor Current - Current Limit Operation N-Channel Buck Switch and Driver The LM5010A integrates an N-Channel buck switch and associated floating high voltage gate driver. The peak current through the buck switch should not exceed 2A, and the load current should not exceed 1.5A.
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com APPLICATIONS INFORMATION EXTERNAL COMPONENTS The procedure for calculating the external components is illustrated with a design example. Referring to the Block Diagram, the circuit is to be configured for the following specifications: • VOUT = 5V • VIN = 6V to 60V • FS = 175 kHz • Minimum load current = 200 mA • Maximum load current = 1.
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LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 This provides a minimum value for L1 - the next higher standard value (100 µH) will be used. To prevent saturation, and possible destructive current levels, L1 must be rated for the peak current which occurs if the current limit and maximum ripple current are reached simultaneously (IPK in Figure 10).
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com If the capacitor used for C2 does not have sufficient ESR, R3 is added in series as shown in the Block Diagram. The value chosen for C2 is application dependent, and it is recommended that it be no smaller than 3.3 µF. C2 affects the ripple at VOUT, and transient response. Experimentation is usually necessary to determine the optimum value for C2.
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LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 Table 2. Bill of Materials Item Description Value C1 Ceramic Capacitor (2) 2.2 µF, 100V C2 Ceramic Capacitor 22 µF, 16V C3 Ceramic Capacitor 0.47 µF, 16V C4, C6 Ceramic Capacitor 0.022 µF, 16V C5 Ceramic Capacitor 0.1 µF, 100V D1 Schottky Diode 100V, 6A L1 Inductor 100 µH R1 Resistor 1.0 kΩ R2 Resistor 1.0 kΩ R3 Resistor 1.
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com L1 SW LM5010A R3 R1 FB VOUT R2 C2 Figure 15. Low Ripple Output Where the circuit of Figure 15 is not suitable, the circuits of Figure 16 or Figure 17 can be used. L1 SW VOUT LM5010A Cff R1 R3 FB R2 C2 Figure 16. Low Output Ripple Using a Feed-Forward Capacitor In Figure 16, Cff is added across R1 to AC-couple the ripple at VOUT directly to the FB pin.
PAGE 17
LM5010A LM5010A-Q1 www.ti.com SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 IPK- = IO(max) - IOR(min) 2 (24) where IO(max) is the maximum load current, and IOR(min) is the minimum ripple current calculated using Equation 20. RCL is calculated from: RCL = 1.0A x 0.11: IPK- - 1.0A (25) where 0.11Ω is the minimum value of the internal resistance from SGND to ISEN. The next smaller standard value resistor should be used for RCL.
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LM5010A LM5010A-Q1 SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013 www.ti.com REVISION HISTORY Changes from Revision D (February 2013) to Revision E • 18 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 Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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PACKAGE MATERIALS INFORMATION www.ti.com 9-Nov-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) LM5010AMHE/NOPB HTSSOP PWP 14 250 178.0 12.4 LM5010AMHX B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 6.95 8.3 1.6 8.0 12.0 Q1 HTSSOP PWP 14 2500 330.0 12.4 6.95 8.3 1.6 8.0 12.0 Q1 LM5010AQ0MHX/NOPB HTSSOP PWP 14 2500 330.0 12.4 6.95 8.3 1.6 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 9-Nov-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM5010AMHE/NOPB HTSSOP PWP LM5010AMHX HTSSOP PWP 14 250 210.0 185.0 35.0 14 2500 367.0 367.0 35.0 LM5010AQ0MHX/NOPB HTSSOP LM5010AQ1MHX/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 PWP 14 2500 367.0 367.0 LM5010ASD 35.0 WSON DPR 10 1000 210.0 185.0 35.0 LM5010ASD/NOPB WSON DPR 10 1000 210.0 185.
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MECHANICAL DATA PWP0014A MXA14A (Rev A) www.ti.
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MECHANICAL DATA DPR0010A SDC10A (Rev A) www.ti.
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