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LM2592HV

www.ti.com

SNVS075C –MAY 2001–REVISED APRIL 2013

LM2592HV SIMPLE SWITCHER

Power Converter 150 kHz 2A Step-Down Voltage

Regulator

Check for Samples: LM2592HV

FEATURES

DESCRIPTION

The LM2592HV series of regulators are monolithic

• 3.3V, 5V, and Adjustable Output Versions

integrated circuits that provide all the active functions

• Adjustable Version Output Voltage Range,

for a step-down (buck) switching regulator, capable of

1.2V to 57V ±4% Max Over Line and Load

driving a 2A load with excellent line and load

Conditions

regulation. These devices are available in fixed output

voltages of 3.3V, 5V, and an adjustable output

• Ensured 2A Output Load Current

version.

• Available in 5-Pin Package

This series of switching regulators is similar to the

• Input Voltage Range up to 60V

LM2593HV, but without some of the supervisory and

• 150 kHz Fixed Frequency Internal Oscillator

performance features of the latter.

• On/Off Control

Requiring a minimum number of external

• Low Power Standby Mode, I

Typically 90 μA

components, these regulators are simple to use and

• High Efficiency

include internal frequency compensation†, improved

line and load specifications and a fixed-frequency

• Thermal Shutdown and Current Limit

oscillator.

Protection

The LM2592HV operates at a switching frequency of

APPLICATIONS

150 kHz thus allowing smaller sized filter components

than what would be needed with lower frequency

• Simple High-Efficiency Step-Down (Buck)

switching regulators. Available in a standard 5-lead

Regulator

package with several different lead bend options, and

• Efficient Pre-Regulator for Linear Regulators

a 5-lead Surface mount package.

• On-Card Switching Regulators

Other features include a ensured ±4% tolerance on

• Positive to Negative Converter

output voltage under all conditions of input voltage

and output load conditions, and ±15% on the

oscillator frequency. External shutdown is included,

featuring typically 90 μA standby current. Self

protection features include a two stage current limit

for the output switch and an over temperature

shutdown for complete protection under fault

conditions.

† Patent Number 5,382,918.

TYPICAL APPLICATION

(Fixed Output Voltage Versions)

Figure 1.

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.

2SIMPLE SWITCHER is a registered trademark of Texas Instruments.

3All other 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 (29 pages)

PAGE 1
LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 LM2592HV SIMPLE SWITCHER® Power Converter 150 kHz 2A Step-Down Voltage Regulator Check for Samples: LM2592HV FEATURES DESCRIPTION • • The LM2592HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 2A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com 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) (2) (3) Maximum Supply Voltage (VIN) 63V ON/OFF Pin Voltage −0.3 ≤ V ≤ +25V Feedback Pin Voltage −0.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS LM2592HV-5.0 Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions LM2592HV-5.0 Typ (1) Limit (2) Units (Limits) SYSTEM PARAMETERS Test Circuit and Layout Guidelines (3) VOUT Output Voltage 7V ≤ VIN ≤ 60V, 0.2A ≤ ILOAD ≤ 2A 5 4.800/4.750 5.200/5.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS ALL OUTPUT VOLTAGE VERSIONS Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Test Circuit and Layout Guidelines) Normalized Output Voltage Line Regulation Figure 2. Figure 3. Efficiency Switch Saturation Voltage Figure 4. Figure 5. Switch Current Limit Dropout Voltage Figure 6. Figure 7.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) (Circuit of Test Circuit and Layout Guidelines) 6 Operating Quiescent Current Shutdown Quiescent Current Figure 8. Figure 9. Minimum Operating Supply Voltage Feedback Pin Bias Current Figure 10. Figure 11. Switching Frequency ON/OFF Threshold Voltage Figure 12. Figure 13.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) (Circuit of Test Circuit and Layout Guidelines) ON/OFF Pin Current (Sinking) Internal Gain-Phase Characteristics Figure 14. Figure 15.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com CONNECTION DIAGRAMS Figure 20. Bent and Staggered Leads, Through Hole Package 5-Lead TO-220 See Package Number NDH Figure 21. Surface Mount Package 5-Lead DDPAK See Package Number KTT Test Circuit and Layout Guidelines Component Values shown are for VIN = 15V, VOUT = 5V, ILOAD = 2A. CIN — 470 μF, 50V, Aluminum Electrolytic Nichicon “PM Series” COUT — 220 μF, 25V Aluminum Electrolytic, Nichicon “PM Series” D1 — 3.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 Select R1 to be approximately 1 kΩ, use a 1% resistor for best stability. Component Values shown are for VIN = 20V, VOUT = 10V, ILOAD = 2A. CIN: — 470 μF, 35V, Aluminum Electrolytic Nichicon “PM Series” COUT: — 220 μF, 35V Aluminum Electrolytic, Nichicon “PM Series” D1 — 3.3A, 60V Schottky Rectifier, 31DQ06 (International Rectifier) L1 — 47 μH, See INDUCTOR VALUE SELECTION GUIDES R1 — 1 kΩ, 1% R2 — 7.15k, 1% CFF — 3.3 nF Typical Values CSS — 0.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com BLOCK DIAGRAM Figure 24. PIN FUNCTIONS +VIN(Pin 1) This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. Output (Pin 2) Internal switch. The voltage at this pin switches between approximately (+VIN − VSAT) and approximately −0.5V, with a duty cycle of VOUT/VIN.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 INDUCTOR VALUE SELECTION GUIDES (For Continuous Mode Operation) Figure 25. LM2592HV-3.3 Figure 26. LM2592HV-5.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com (For Continuous Mode Operation) Figure 27. LM2592HV-ADJ Figure 28.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 Table 1. Contact Information for Suggested Inductor Manufacturers Coilcraft Inc. Coilcraft Inc., Europe Pulse Engineering Inc. Pulse Engineering Inc., Europe Renco Electronics Inc. Schott Corp. Cooper Electronic Tech. (Coiltronics) Phone (USA): 1-800-322-2645 Web Address http://www.coilcraft.com Phone (UK): 1-236-730595 Web Address http://www.coilcraft-europe.com Phone (USA): 1-858-674-8100 Web Address http://www.pulseeng.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com APPLICATION INFORMATION INDUCTOR SELECTION PROCEDURE Application Note AN-1197 titled "Selecting Inductors for Buck Converters" provides detailed information on this topic. For a quick-start the designer may refer to the nomographs provided in Figure 25 to Figure 27.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 Example 2: (VIN > 40V) LM2592HV-5.0, VIN = 48V, Output 5V @ 1.5A 1. A first pass inductor selection is based upon Inductance and the switch currrent limit. We choose an inductor with the Inductance value indicated by the nomograph (see Figure 26) and a current rating equal to ICLIM. We therefore quick-select a 68μH/4A inductor (designed for 150 kHz operation) for this application. 2.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com INPUT CAPACITOR CIN —A low ESR aluminum or tantalum bypass capacitor is needed between the input pin and ground pin. It must be located near the regulator using short leads. This capacitor prevents large voltage transients from appearing at the input, and provides the instantaneous current needed each time the switch turns on. The important parameters for the Input capacitor are the voltage rating and the RMS current rating.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 UNDERVOLTAGE LOCKOUT Some applications require the regulator to remain off until the input voltage reaches a predetermined voltage. An undervoltage lockout feature applied to a buck regulator is shown in Figure 30, while Figure 31 and Figure 32 applies the same feature to an inverting circuit. The circuit in Figure 31 features a constant threshold voltage for turn on and turn off (zener voltage plus approximately one volt).
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com lNVERTING REGULATOR The circuit in Figure 33 converts a positive input voltage to a negative output voltage with a common ground. The circuit operates by bootstrapping the regulator's ground pin to the negative output voltage, then grounding the feedback pin, the regulator senses the inverted output voltage and regulates it. This example uses the LM2592HV-5.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 CIN — 68 μF/25V Tant. Sprague 595D 470 μF/50V Elec. Panasonic HFQ COUT — 47 μF/20V Tant. Sprague 595D 220 μF/25V Elec. Panasonic HFQ Figure 33. Inverting −5V Regulator with Delayed Startup Because of differences in the operation of the inverting regulator, the standard design procedure is not used to select the inductor value. In the majority of designs, a 33 μH, 4A inductor is the best choice.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com Figure 35. Inverting Regulator Ground Referenced Shutdown using Opto Device THERMAL CONSIDERATIONS The LM2592HV is available in two packages, a 5-pin TO-220 (NDH) and a 5-pin surface mount DDPAK (KTT). The TO-220 package needs a heat sink under most conditions. The size of the heatsink depends on the input voltage, the output voltage, the load current and the ambient temperature. Higher ambient temperatures require more heat sinking.
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LM2592HV www.ti.com SNVS075C – MAY 2001 – REVISED APRIL 2013 Figure 36. Junction Temperature Rise, DDPAK Layout Suggestions As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground loops, with reference to Test Circuit and Layout Guidelines, the wires indicated by heavy lines should be wide printed circuit traces and should be kept as short as possible.
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LM2592HV SNVS075C – MAY 2001 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision B (April 2013) to Revision C • 22 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LM2592HVS-3.3 NRND DDPAK/ TO-263 KTT 5 45 TBD Call TI Call TI -40 to 125 LM2592HVS -3.3 P+ LM2592HVS-3.3/NOPB ACTIVE DDPAK/ TO-263 KTT 5 45 Pb-Free (RoHS Exempt) CU SN Level-3-245C-168 HR -40 to 125 LM2592HVS -3.3 P+ LM2592HVS-5.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ DDPAK/ TO-263 KTT 5 500 330.0 24.4 LM2592HVSX-3.3/NOPB DDPAK/ TO-263 KTT 5 500 330.0 LM2592HVSX-5.0/NOPB DDPAK/ TO-263 KTT 5 500 DDPAK/ TO-263 KTT 5 LM2592HVSX-ADJ/NOPB DDPAK/ TO-263 KTT 5 LM2592HVSX-3.3 LM2592HVSX-ADJ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 10.75 14.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM2592HVSX-3.3 DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0 LM2592HVSX-3.3/NOPB DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0 LM2592HVSX-5.0/NOPB DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0 LM2592HVSX-ADJ DDPAK/TO-263 KTT 5 500 367.0 367.0 45.0 LM2592HVSX-ADJ/NOPB DDPAK/TO-263 KTT 5 500 367.0 367.0 45.
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MECHANICAL DATA NDH0005D www.ti.
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MECHANICAL DATA KTT0005B TS5B (Rev D) BOTTOM SIDE OF PACKAGE 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.