Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Boost SON 10

2.7V ± 5.5V

4.7 PF

LM4500

LOAD

PGND

AGND

COMP

L = 4.7 PH

VIN SW VOUT

LM4510

OUT

16.0V

OUT

10 PF

240k

20.5k

46.4k

2.2 nF

15 pF

10 nF

LM4510

www.ti.com

SNVS533C –SEPTEMBER 2007–REVISED MAY 2013

LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation

Check for Samples: LM4510

FEATURES

APPLICATIONS

• 18V@80 mA from 3.2V Input

• Organic LED Panel Power Supply

• 5V@280 mA from 3.2V Input • Charging Holster

• No External Schottky Diode Required • White LED Backlight

• 85% Peak Efficiency • USB Power Supply

• Soft Start • Class D Audio Amplifier

• True Shutdown Isolation • Camera Flash LED Driver

• Stable with Small Ceramic or Tantalum Output

DESCRIPTION

Capacitors

The LM4510 is a current mode step-up DC/DC

• Output Short-Circuit Protection

converter with a 1.2A internal NMOS switch designed

• Feedback Fault Protection

to deliver up to 120 mA at 16V from a Li-Ion battery.

• Input Under-Voltage Lock Out

The device's synchronous switching operation (no

• Thermal Shutdown

external Schottky diode) at heavy-load, and non-

• 0.002 µA Shutdown Current synchronous switching operation at light-load,

maximizes power efficiency.

• Wide Input Voltage Range: 2.7V to 5.5V

True shutdown function by synchronous FET and

• 1.0 MHz Fixed Frequency Operation

related circuitry ensures input and output isolation.

• Low-profile 10–pin SON Package (3mm x 3mm

x 0.8mm)

A programmable soft-start circuit allows the user to

limit the amount of inrush current during startup. The

output voltage can be adjusted by external resistors.

Typical Application Circuit

Figure 1. Typical Application Circuit

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 (23 pages)

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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 LM4510 Synchronous Step-Up DC/DC Converter with True Shutdown Isolation Check for Samples: LM4510 FEATURES APPLICATIONS • • • • • • • • • • • • • 1 2 • • • • • • • • 18V@80 mA from 3.2V Input 5V@280 mA from 3.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com DESCRIPTION (CONTINUED) The LM4510 features advanced short-circuit protection to maximize safety during output to ground short condition. During shutdown the feedback resistors and the load are disconnected from the input to prevent leakage current paths to ground. The LM4510 is available in a 10-pin thermally enhanced Leadless Leadframe Package: SON-10. 100 VIN = 4.5V VIN = 5.5V EFFICIENCY (%) 90 80 VIN = 3.6V VIN = 2.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 Pin Descriptions (continued) Name Pin FB 8 Output voltage feedback connection. Description N/C 9 No internal connection. VOUT 10 Internal PMOS source connection for synchronous rectification. DAP DAP Die Attach Pad thermal connection These devices have limited built-in ESD protection.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com Electrical Characteristics (1) (2) Limits in standard type face are for TJ = 25°C only. Limits in boldface type apply over the full operating junction temperature range ( −40°C ≤ TJ ≤+125°C). Unless otherwise stated the following conditions apply: VIN = 3.6V, EN = 3.6V. Parameter VFB Test Conditions 2.7V ≤ VIN ≤ 5.5V FB Pin Voltage IFB FB Pin Bias Current RDS(on) ICL (2) Max (1) Units 1.265 1.29 V µA 0.050 1.5 ISW = 0.3A 0.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 Typical Performance Characteristics LM4510SD, Circuit of Figure 1, (L=4.7 µH, COILCRAFT, DO3316-472ML; CIN=4.7 µF, TDK, C2012X5R0J475K; COUT=10 µF, AVX, 12103D106KAT2A; CS=10 nF, TDK, C1608C0G1E103J; CC1=2.2 nF, Taiyo Yuden, TMK107SD222JA-T; RC=46.4 KΩ, Yageo, 9t06031A4642FBHFT), VIN=3.6V, VOUT=16V, TA=25°C, unless otherwise noted. Switching Quiescent Current vs VIN RDS(on) vs Temperature at VIN= 3.6V 2.8 1200 2.6 1000 2.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) LM4510SD, Circuit of Figure 1, (L=4.7 µH, COILCRAFT, DO3316-472ML; CIN=4.7 µF, TDK, C2012X5R0J475K; COUT=10 µF, AVX, 12103D106KAT2A; CS=10 nF, TDK, C1608C0G1E103J; CC1=2.2 nF, Taiyo Yuden, TMK107SD222JA-T; RC=46.4 KΩ, Yageo, 9t06031A4642FBHFT), VIN=3.6V, VOUT=16V, TA=25°C, unless otherwise noted. Load Regulation (VOUT = 5 V ) Line Regulation (VOUT = 16 V ) 5.030 16.25 IOUT = 30 mA 5.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 Typical Performance Characteristics (continued) LM4510SD, Circuit of Figure 1, (L=4.7 µH, COILCRAFT, DO3316-472ML; CIN=4.7 µF, TDK, C2012X5R0J475K; COUT=10 µF, AVX, 12103D106KAT2A; CS=10 nF, TDK, C1608C0G1E103J; CC1=2.2 nF, Taiyo Yuden, TMK107SD222JA-T; RC=46.4 KΩ, Yageo, 9t06031A4642FBHFT), VIN=3.6V, VOUT=16V, TA=25°C, unless otherwise noted. Line Transient Response (VOUT = 16 V ) Load Transient Response (VOUT = 16 V ) Figure 16.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) LM4510SD, Circuit of Figure 1, (L=4.7 µH, COILCRAFT, DO3316-472ML; CIN=4.7 µF, TDK, C2012X5R0J475K; COUT=10 µF, AVX, 12103D106KAT2A; CS=10 nF, TDK, C1608C0G1E103J; CC1=2.2 nF, Taiyo Yuden, TMK107SD222JA-T; RC=46.4 KΩ, Yageo, 9t06031A4642FBHFT), VIN=3.6V, VOUT=16V, TA=25°C, unless otherwise noted. Output Voltage Ripple (VOUT = 5 V, IOUT = 100 mA) Figure 22.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 BLOCK DIAGRAM EN VIN SS VOUT 10 uA S/D Feedback Fault Protection + - TSD UVP REF OSC BODY DIODE CTRL and TRUE S/D UVP + - LOGIC SCP CURRENT LIMIT Current Sense Ramp RESET SYNC/NONSYNC S Q PWM + BG SET R Q SW BG COMP + EAMP REF AGND FB PGND Figure 23.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com OPERATION IN SYNCHRONOUS CONTINUOUS CONDUCTION MODE (CYCLE 1, CYCLE 2) VSW1 VOUT PMOS NMOS +- PWM GND RLOAD COUT Figure 24. Schematic of Synchronous Boost Converter Synchronous boost converter is shown in Figure 24. At the start of each cycle, the oscillator sets the driver logic and turns on the NMOS power device and turns off the PMOS power device. Cycle 1 Description Refer to Figure 25.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 ON/OFF CONTROL The LM4510 shuts down when the EN pin is low. In this mode the feedback resistors and the load are disconnected from the input in order to avoid leakage current flow and to allow the output voltage to drop to 0V. The LM4510 turns on when EN is high. There is an internal pull-down resistor on the EN pin so the device is in a normally off state. SHORT CIRCUIT PROTECTION When VOUT goes down to VIN–0.7V (typ.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com Table 1. Suggested Component Values for Different Output Voltages Output Voltage (V) RF2 (kΩ) RF1 (kΩ) RC (kΩ) CC1 (nF) 16 20.5 240 46.4 2.2 12 20.5 174 46.4 2.2 5 20.5 60.4 46.4 2.2 3.3 20.5 33 46.4 2.2 MAXIMUM OUTPUT CURRENT When the output voltage is set at different level, it is important to know the maximum load capability. By first order estimation, IOUT(MAX) can be estimated by the following equation: 1.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 To prevent loss of regulation, ensure that the NMOS power switch current limit is greater than the worst-case peak inductor current in the target application. Also make sure that the inductor saturation current is greater than the peak inductor current under the worst-case load transient, high ambient temperature and startup conditions. Refer to Table 2 for suggested inductors. Table 2.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com Table 3. Suggested CIN and COUT Capacitors and Their Suppliers Model Type Vendor Voltage Rating Case Size Inch (mm) 4.7 µF for CIN C2012X5R0J475 Ceramic, X5R TDK 6.3V 0805 (2012) GRM21BR60J475 Ceramic, X5R muRata 6.3V 0805 (2012) JMK212BJ475 Ceramic, X5R Taiyo-Yuden 6.3V 0805 (2012) C2012X5R0J475K Ceramic, X5R TDK 6.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 The series combination of RC and CC1 introduces a pole-zero pair according to the following equations: fPC = 1 [ Hz] 2S(RC + RO) CC1 f ZC = 1 [ Hz] 2SRCCC1 (9) In addition, CC2 introduces a pole according to the following equation: fPC2 = 1 [ Hz] 2S(RC // R O ) CC2 (10) Where RO is the output impedance of the error amplifier, approximately 1 MΩ, and amplifier voltage gain is typically 200 V/V depending on temperature and VIN.
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LM4510 SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 www.ti.com 3. All voltage-sensing resistors (RF1, RF2) should be kept close to the FB pin to minimize copper trace connections that can inject noise into the system. The ground connection for the voltage-sensing resistor should be connected directly to the AGND pin. 4. Trace connections made to the inductor should be minimized to reduce power dissipation, EMI radiation and increase overall efficiency.
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LM4510 www.ti.com SNVS533C – SEPTEMBER 2007 – REVISED MAY 2013 REVISION HISTORY Changes from Revision B (May 2013) to Revision C • 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 11-May-2014 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-May-2014 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 LM4510SD/NOPB WSON DSC 10 1000 180.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LM4510SDX/NOPB WSON DSC 10 4500 330.0 12.4 3.3 3.3 1.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-May-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM4510SD/NOPB WSON DSC 10 1000 203.0 203.0 35.0 LM4510SDX/NOPB WSON DSC 10 4500 346.0 346.0 35.
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MECHANICAL DATA DSC0010A SDA10A (Rev A) www.ti.
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