Datasheet

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

BST

LM5010

/ SD

8V - 75V

Input

OUT

RTN

SEN

GND

SHUTDOWN

LM5010

www.ti.com

SNVS307F –SEPTEMBER 2004–REVISED FEBRUARY 2013

High-Voltage 1-A Step-Down Switching Regulator

Check for Samples: LM5010

FEATURES

APPLICATIONS

• Input Voltage Range: 8V to 75V

• High Efficiency Point-Of-Load (POL) Regulator

• Valley Current Limit At 1.25A • Non-Isolated Telecommunications Buck

Regulator

• Switching Frequency Can Exceed 1 MHz

• Secondary High Voltage Post Regulator

• Integrated N-Channel Buck Switch

• Automotive Systems

• Integrated Startup Regulator

• No Loop Compensation Required

DESCRIPTION

• Ultra-Fast Transient Response

The LM5010 Step Down Switching Regulator features

• Operating Frequency Remains Constant With

all the functions needed to implement a low cost,

Load and Line Variations

efficient, buck bias regulator capable of supplying in

excess of 1A load current. This high voltage regulator

• Maximum Duty Cycle Limited During Startup

contains an N-Channel Buck Switch, and is available

• Adjustable Output Voltage

in thermally enhanced 10-pin WSON and 14-pin

• Precision 2.5V Feedback Reference

HTSSOP packages. The hysteretic regulation

scheme requires no loop compensation, results in

• Thermal shutdown

fast load transient response, and simplifies circuit

• Packages

implementation. The operating frequency remains

– 10-Pin WSON (4 mm x 4 mm)

constant with line and load variations due to the

– 14-Pin HTSSOP inverse relationship between the input voltage and

the on-time. The valley current limit detection is set at

– Both Packages Have Exposed Thermal Pad

1.25A. Additional features include: V

under-voltage

For Improved Heat Dissipation

lockout, thermal shutdown, gate drive under-voltage

lockout, and maximum duty cycle limiter.

DEVICE INFORMATION

Figure 1. 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 (26 pages)

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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 High-Voltage 1-A Step-Down Switching Regulator Check for Samples: LM5010 FEATURES APPLICATIONS • • • • • • • • • • 1 2 • • • • • Input Voltage Range: 8V to 75V Valley Current Limit At 1.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com Connection Diagram Top View Top View 1 2 3 4 5 SW VIN BST VCC I SEN R ON /SD S GND SS RTN FB 10 1 9 2 8 3 14 NC NC SW VIN BST VCC 7 4 I SEN R ON /SD 6 5 6 10 Lead WSON 7 S GND SS RTN FB NC NC 13 12 11 10 9 8 14 Lead HTSSOP Pin Functions Table 1.
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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – 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 GND 76V BST to GND 90V SW to GND (Steady State) -1.5V BST to VCC 76V BST to SW 14V VCC to GND 14V SGND to RTN -0.3V to +0.3V SS to RTN -0.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com Electrical Characteristics (continued) Specifications with standard typeface are for TJ = 25°C, and those with boldface type apply over full Operating Junction Temperature range. VIN = 48V, RON = 200kΩ, unless otherwise stated (1) and (2). Symbol Parameter Test Conditions Min Typ Max Unit 0.35 0.80 Ω 4.3 5.0 Switch Characteristics Rds(on) Buck Switch Rds(on) ITEST = 200 mA UVLOGD Gate Drive UVLO VBST - VSW Increasing 3.
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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 TYPICAL APPLICATION CIRCUIT AND BLOCK DIAGRAM INPUT 10 LM5010 7V START-UP REGULATOR VIN C5 VCC UVLO VCC 9 Thermal Shutdown C3 C1 RON ON TIMER 8 R ON /SD 7 RON START COMPLETE 2.5V 11.5 PA SS 265 ns OFF TIMER 0.7V START COMPLETE VIN C4 DRIVER LOGIC Driver C6 6 FB BST 2 Gate Drive UVLO LEVEL SHIFT L1 OVER-VOLTAGE COMPARATOR REGULATION COMPARATOR D1 CURRENT LIMIT COMPARATOR 62.5 mV 5 RTN VOUT1 SW 1 2.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com Typical Performance Characteristics 7.5 8 VIN = 48V 7 7.0 6 FS = 100 kHz FS = 620 kHz VIN = 8V 5 VCC (V) VCC (V) 6.5 6.0 VIN = 9V 4 FS = 200 kHz 3 2 5.5 VCC Externally Loaded Load Current = 300 mA ICC = 0 mA 1 FS = 100 kHz 5.0 0 6.5 7.0 7.5 8.0 8.5 9.0 10 9.5 0 2 4 VIN (V) 10 Figure 3. VCC vs ICC 9 8.0 8 7.0 FS = 550 kHz RON = 500k 7 6.0 6 ON-TIME (Ps) ICC INPUT CURRENT(mA) 8 ICC (mA) Figure 2.
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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 Typical Performance Characteristics (continued) VIN 7.0V UVLO VCC SW Pin Inductor Current 2.5V SS Pin VOUT t2 t1 Figure 8. Startup Sequence FUNCTIONAL DESCRIPTION The LM5010 Step Down Switching Regulator features all the functions needed to implement a low cost, efficient buck bias power converter capable of supplying in excess of 1A to the load.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com Hysteretic Control Circuit Overview The LM5010 buck DC-DC regulator 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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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 Start-up Regulator (VCC) The startup regulator is integral to the LM5010. The input pin (VIN) can be connected directly to line voltages up to 75V. The VCC output is regulated at 7.0V, ±6%, and is current limited to 10 mA. Upon power up the regulator sources current into the external capacitor at VCC (C3). With a 0.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com The inverse relationship of tON vs. VIN results in a nearly constant frequency as VIN is varied. If the application requires a high frequency the minimum value for tON, and consequently RON, is limited by the off-time (265 ns, ±15%) which limits the maximum duty cycle at minimum VIN. The tolerance for Equation 5 is ±25%. Frequencies in excess of 1 MHz are possible with the LM5010.
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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 IPK 'I IOCL Inductor Current Threshold IO Normal Operation Load Current Increases Current Limited Figure 12. Inductor Current - Current Limit Operation The current limit threshold can be increased by connecting an external resistor (RCL) between SGND and ISEN. The external resistor typically is less than 1Ω, and its calculation is explained in the Applications Information section.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com APPLICATIONS INFORMATION EXTERNAL COMPONENTS The procedure for calculating the external components is illustrated with a design example. The circuit in Typical Application Circuit and Block Diagram is to be configured for the following specifications: • VOUT = 10V • VIN = 15V to 75V • FS = 625 kHz • Minimum load current = 150 mA • Maximum load current = 1.
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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 This provides a minimum value for L1 - the next higher standard value (100 µH) will be used. L1 must be rated for the peak current (IPK+) to prevent saturation. The peak current occurs at maximum load current with maximum ripple. The maximum ripple is calculated by re-arranging Equation 9 using VIN(max), FS(min), and the minimum inductor value, based on the manufacturer’s tolerance.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com 1.18 x 10-10 x (137k + 1.4k) x 1.25 tON(max) = 15V - 1.4V + 67 ns = 1.57 Ps (17) C1 is calculated from: C1 = IO x tON = 'V 1.0A x 1.57 Ps 1V = 1.57 PF (18) where IO is the load current, and ΔV is the allowable ripple voltage at VIN (1V for this example). Quality ceramic capacitors with a low ESR should be used for C1. To allow for capacitor tolerances and voltage effects, a 2.
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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 Table 2. Bill of Materials Item Description Part No. Package Value C1 Ceramic Capacitor TDK C4532X7R2A225M 1812 2.2 µF, 100V C2 Ceramic Capacitor TDK C4532X7R1E156M 1812 15 µF, 25V C3 Ceramic Capacitor Kemet C0805C104K4RAC 0805 0.1 µF, 16V C4, C6 Ceramic Capacitor Kemet C0805C223K4RAC 0805 0.022 µF, 16V C5 Ceramic Capacitor TDK C2012X7R2A104M 0805 0.
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LM5010 SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 www.ti.com INCREASING THE CURRENT LIMIT THRESHOLD The current limit threshold is nominally 1.25A, with a minimum guaranteed value of 1.0A. If, at maximum load current, the lower peak of the inductor current (IPK-in Figure 13) exceeds 1.0A, resistor RCL must be added between SGND and ISEN to increase the current limit threshold to equal or exceed that lower peak current.
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LM5010 www.ti.com SNVS307F – SEPTEMBER 2004 – REVISED FEBRUARY 2013 REVISION HISTORY Changes from Revision E (February 2013) to Revision F • 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 30-Mar-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) LM5010MHX/NOPB HTSSOP PWP 14 2500 330.0 12.4 LM5010SD/NOPB WSON DPR 10 1000 178.0 LM5010SDX/NOPB WSON DPR 10 4500 330.0 6.95 8.3 1.6 8.0 12.0 Q1 12.4 4.3 4.3 1.3 8.0 12.0 Q1 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) LM5010MHX/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 LM5010SD/NOPB WSON DPR 10 1000 210.0 185.0 35.0 LM5010SDX/NOPB WSON DPR 10 4500 367.0 367.0 35.
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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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