LT1930

LT1930 LINER

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Technical content

Figure 1. 5V to 12V, 300mA Step-Up DC/DC Converter 2.2MHz, enabling further reductions in inductor size. square inch in area are achievable with these devices. 300mA from four alkaline cells in a SEPIC design.

1930 TA01

ThinSOT is a trademark of Linear Technology Corporation.

(Note 1) Operating Temperature Range (Note 2) .. – 40°C to 85°C The l denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VIN = 3V, VSHDN = VIN unless otherwise noted. (Note 2) ORDER PART NUMBER LT1930ES5 LT1930AES5 S5 PART MARKING LTKS LTSQ TJMAX = 125°C, qJA = 256°C/ W

ELECTRICAL CHARACTERISTICS

PACKAGE/ORDER I FOR ATIOUU WABSOLUTE AXI U RATI GSW WW U Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT1930E/LT1930AE are guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the – 40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Current limit guaranteed by design and/or correlation to static test. Consult LTC Marketing for parts specified with wider operating temperature ranges. SW 1 GND 2 TOP VIEW S5 PACKAGE 5-LEAD PLASTIC SOT-23 FB 3

5 VIN

4 SHDN

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Minimum Operating Voltage 2.45 2.6 2.45 2.6 V Maximum Operating Voltage 16 16 V l 1.230 1.280 1.230 1.280 V FB Pin Bias Current V FB = 1.255V l 120 360 240 720 nA Quiescent Current V SHDN = 2.4V, Not Switching 4.2 6 5.5 8 mA Quiescent Current in Shutdown V SHDN = 0V, VIN = 3V 0.01 1 0.01 1 mA l 0.85 1.6 1.6 2.9 MHz Maximum Duty Cycle l 84 90 75 90 % Switch Current Limit (Note 3) 1 1.2 2 1 1.2 2.5 A Switch VCESAT ISW = 1A 400 600 400 600 mV Switch Leakage Current V SW = 5V 0.01 1 0.01 1 mA SHDN Input Voltage High 2.4 2.4 V SHDN Input Voltage Low 0.5 0.5 V SHDN Pin Bias Current V SHDN = 3V 16 32 35 70 mA VSHDN = 0V 0 0.1 0 0.1 mA

TYPICAL PERFOR A CE CHARACTERISTICS UW Quiescent Current FB Pin Voltage SHDN Pin Current Current Limit Switch Saturation Voltage Oscillator Frequency SW (Pin 1): Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. GND (Pin 2): Ground. Tie directly to local ground plane. FB (Pin 3): Feedback Pin. Reference voltage is 1.255V. Connect resistive divider tap here. Minimize trace area at FB. Set VOUT according to VOUT = 1.255V(1 + R1/R2). UUUPI FU CTIO S SHDN (Pin 4): Shutdown Pin. Tie to 2.4V or more to enable device. Ground to shut down. VIN (Pin 5): Input Supply Pin. Must be locally bypassed. TEMPERATURE (°C) –50 –25 QUIESCENT CURRENT (mA) 50 75 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 1930/A G01 0 25 100 NOT SWITCHING LT1930A LT1930 TEMPERATURE (°C) –50

1.22 FB VOLTAGE (V)

1.23 1.24 1.25 1.26 1.28 –25 02 5 5 0 1930/A G02 75 100 1.27 SHDN PIN VOLTAGE (V) SHDN PIN CURRENT (µA) 3 5 1930/A G03 –10 12 4 LT1930A LT1930 DUTY CYCLE (%) CURRENT LI MIT (A) 0.8 1.2 1930/A G04 0.4 3020 50 40 70 60 90 80 1.6 0.6 1.0 0.2 1.4 SWITCH CURRENT (A) VCESAT (V) 0.05 0.15 0.20 0.25 0.8 0.45 1930/A G05 0.10 0.30 0.35 0.40 TEMPERATURE (°C) –50 –25 0 FREQUENCY (MHz) 2.5 2.3 2.1 1.9 1.7 1.5 1.3 1.1 0.9 0.7 0.5 25 50 75 100 1930/A G06 LT1930 LT1930A

Figure 2. Block Diagram LT1930 has a current limit circuit not shown in Figure 2. external components connected to the LT1930. tical except that the oscillator frequency is 2.2MHz.

LT1930. Care must be taken in deciding which part to use. the actual duty cycle is reduced. in Table 1 and those for the LT1930A are listed in Table 2. inductor only carries one-half of the total switch current. Table 1. Recommended Inductors – LT1930 Table 2. Recommended Inductors – LT1930A smaller Murata LQH3C Series.

Figure 5. Transient Response of Step-Up Converter with 33mF LT1930A. The Motorola MBR0520 is a very good choice. 0.5A, a Microsemi UPS5817 rated at 1A is recommended. (see Figure 1) according to the following equation. resistor divider chain to 1.255V/13.3k = 94.7mA. Figure 6. Suggested Layout

1930 F06

1930 F07

Figure 7. Keeping SHDN Below 10V shows the recommended component placement. IN = 16V and SHDN is obtained from VIN. The voltage on the SHDN pin is kept below 10V.

4V TO 6.5V D1L1 10µH 10µH 243kLT1930

1930 TA02a

2.2µF 4-CELL BATTERY C2 10µF 1µF 82.5k VOUT 300mA C1: TAIYO-YUDEN X5R LMK212BJ225MG C2: TAIYO-YUDEN X5R JMK316BJ106ML C3: TAIYO-YUDEN X5R LMK212BJ105MG SHDN D1: ON SEMICONDUCTOR MBR0520 L1, L2: MURATA LQH3C100K24 LOAD CURRENT (mA) EFFICIENCY (%) 400 500

1930 TA02b

VIN = 6.5V VIN = 4V 4-Cell to 5V SEPIC Converter 4-Cell to 5V SEPIC Converter with Coupled Inductors GND VIN SW SHDN FB 4V TO 6.5V D1L1A 10µH L1B 10µH 243kLT1930 1930/A TA03 2.2µF 4-CELL BATTERY C2 10µF 1µF 82.5k VOUT 300mA C1: TAIYO-YUDEN X5R LMK212BJ225MG C2: TAIYO-YUDEN X5R JMK316BJ106ML C3: TAIYO-YUDEN X5R LMK212BJ105MG D1: ON SEMICONDUCTOR MBR0520 L1: SUMIDA CLS62-100 SHDN GND VIN SW SHDN FB VIN D1L1 10µH 665k LT1930 1930/A TA04 2.2µF 4.7µF 36.5k VOUT 24V 90mA C1: TAIYO-YUDEN X5R EMK316BJ475ML C2: TAIYO-YUDEN X5R JMK212BJ475MG D1: ON SEMICONDUCTOR MBR0530 L1: SUMIDA CR43-100 SHDN 5V to 24V Boost Converter GND VIN SW SHDN FB VIN 1µF 3.3µH 147k 1µF LT1930 D3 D4 1930/A TA05 2.2µF 2.2µF 2.2µF 13.3k –15V 70mA 15V 70mA C1: TAIYO-YUDEN X5R LMK212BJ225MG C2, C3: TAIYO-YUDEN X5R EMK316BJ225ML C4, C5: TAIYO-YUDEN X5R TMK316BJ105ML (408) 573-4150 D1 TO D4: ON SEMICONDUCTOR MBR0520 (800) 282-9855 L1: SUMIDA CR43-3R3 (874) 956-0666 OFF ON –15V Dual Output Converter with Output Disconnect

3.3V D1L1 5.6µH 40.2k LT1930 1930/A TA07a 10µF 4.7µF 13.3k VOUT 480mA C1: TAIYO-YUDEN X5R JMK212BJ475MG www.t-yuden.com C2: TAIYO-YUDEN X5R JMK316BJ106ML D1: ON SEMICONDUCTOR MBR0520 www.onsemi.com L1: SUMIDA CR43-5R6 www.sumida.com OFF ON LOAD CURRENT (mA) EFFICIENCY (%)65 300 500 1930/A TA07b 100 200 400 VIN = 3.3V VIN = 2.6V Efficiency3.3V to 5V Boost Converter GND VIN SW SHDN FB D1M1 4.7µH 60.4k 11.3k LT1930 1930/A TA06 2.2µF VIN 3V to 6V 22µF 47pF VOUT 520mA AT V IN = 6V 240mA AT VIN = 3V C1: TAIYO-YUDEN X5R LMK432BJ226MM C2: TAIYO-YUDEN X5R LMK212BJ225MG D1: ON SEMICONDUCTOR MBR0520 L1: SUMIDA CR43-4R7 M1: SILICONIX Si6433DQ SHDN Boost Converter with Reverse Battery Protection GND VIN SW SHDN FB VIN D1L1 2.2µH 115kLT1930A 1930/A TA08a 2.2µF 2.2µF 13.3k VOUT 12V 250mA C1: TAIYO-YUDEN X5R LMK212BJ225MG C2: TAIYO-YUDEN X5R EMK316BJ225ML D1: ON SEMICONDUCTOR MBR0520 L1: MURATA LQH3C2R2M24 SHDN LOAD CURRENT (mA) EFFICIENCY (%)65 150 250 1930/A TA08b 50 100 200 300 VIN = 5V VOUT = 12V 5V to 12V, 250mA Step-Up Converter Efficiency

3.3V D5L1 4.7µH 124k LT1930 1930/A TA11a 10µF 1µF 2.2µF 0.1µF 1µF 20k 200mA –9V 10mA 18V 10mA C1: X5R OR X7R, 6.3V C2,C3, C5: X5R OR X7R, 10V C4: X5R OR X7R, 25V D1- D4: BAT54S OR EQUIVALENT D5: MBR0520 OR EQUIVALENT L1: PANASONIC ELT5KT4R7M 3.3V VSS DSS 1N4148 RSS 30k CSS 68nF 0.1µF GND VIN SW SHDN FB VIN 3.3V D7L1 4.7µH 113k LT1930 1930/A TA12a 10µF 1µF 2.2µF 0.1µF 1µF 21k 220mA –8V 10mA 23V 10mA C1: X5R OR X7R, 6.3V C2-C4, C7, C8: X5R OR X7R, 10V C5: X5R OR X7R, 16V C6: X5R OR X7R, 25V D1- D6: BAT54S OR EQUIVALENT D7: MBR0520 OR EQUIVALENT L1: PANASONIC ELT5KT4R7M 3.3V VSS DSS 1N4148 RSS 30k CSS 68nF 0.1µF 0.1µF 0.1µF D3 D4 8V, 23V, –8V Triple Output TFT-LCD Bias Supply with Soft-Start 9V, 18V, –9V Triple Output TFT-LCD Bias Supply with Soft-Start Start-Up Waveforms Start-Up Waveforms 9V OUTPUT 5V/DIV –9V OUTPUT 5V/DIV 18V OUTPUT 10V/DIV IL1 0.5A/DIV 2ms/DIV 8V OUTPUT 5V/DIV –8V OUTPUT 5V/DIV 23V OUTPUT 10V/DIV IL1 0.5A/DIV 2ms/DIV

1.50 – 1.75 (.059 – .069) (NOTE 3) 2.60 – 3.00 (.102 – .118) .25 – .50 (.010 – .020) (5PLCS, NOTE 2) L DATUM ‘A’ .09 – .20 (.004 – .008) (NOTE 2) S5 SOT-23 0401 PIN ONE 2.80 – 3.10 (.110 – .118) (NOTE 3) .95 (.037) REF A A2 1.90 (.074) REF .20 (.008) .90 – 1.45 (.035 – .057) SOT-23 (Original) .00 – .15 (.00 – .006) .90 – 1.30 (.035 – .051) .35 – .55 (.014 – .021)

1.00 MAX

(.039 MAX) SOT-23 (ThinSOT) A L .01 – .10 (.0004 – .004) .80 – .90 (.031 – .035) .30 – .50 REF (.012 – .019 REF) MILLIMETERS (INCHES) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE 4. DIMENSIONS ARE INCLUSIVE OF PLATING 5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 6. MOLD FLASH SHALL NOT EXCEED .254mm 7. PACKAGE EIAJ REFERENCE IS: SC-74A (EIAJ) FOR ORIGINAL JEDEL MO-193 FOR THIN Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 5-Lead Plastic SOT-23 (Reference LTC DWG # 05-08-1633) (Reference LTC DWG # 05-08-1635)

1930af LT/TP 0801 2K • PRINTED IN USA ª LINEAR TECHNOLOGY CORPORATION 2001 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 l FAX: (408) 434-0507 l www.linear.com RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1307 Single Cell Micropower 600kHz PWM DC/DC Converter 3.3V at 75mA from Single Cell, MSOP Package LT1316 Burst Mode TM Operation DC/DC Converter with Programmable Current Limit 1.5V Minimum, Precise Control of Peak Current Limit LT1317 2-Cell Micropower DC/DC Converter with Low-Battery Detector 3.3V at 200mA from 2 Cells, 600kHz Fixed Frequency LT1610 Single Cell Micropower DC/DC Converter 3V at 30mA from 1V, 1.7MHz Fixed Frequency LT1611 Inverting 1.4MHz Switching Regulator in 5-Lead ThinSOT –5V at 150mA from 5V Input, ThinSOT Package LT1613 1.4MHz Switching Regulator in 5-Lead ThinSOT 5V at 200mA from 3.3V Input, ThinSOT Package LT1615 Micropower Constant Off-Time DC/DC Converter in 5-Lead ThinSOT 20V at 12mA from 2.5V, ThinSOT Package LT1617 Micropower Inverting DC/DC Converter in 5-Lead ThinSOT –15V at 12mA from 2.5V Input, ThinSOT Package LT1931/LT1931A Inverting 1.2MHz/2.2MHz Switching Regulator in 5-Lead ThinSOT –5V at 350mA from 5V input, ThinSOT Package Burst Mode is a trademark of Linear Technology Corporation. TYPICAL APPLICATIO U 3.3V to 5V Transient Response VOUT 50mV/DIV AC COUPLED ILI 0.5A/DIV AC COUPLED 300mA 200mA LOAD CURRENT 20ms/DIV 1930 F03 GND VIN SW SHDN FB VIN 3.3V D1L1 2.2µH 30.1k LT1930A 1930/A TA09a 10µF 2.2µF 10k VOUT 450mA C1: TAIYO-YUDEN X5R LMK212BJ225MG C2: TAIYO-YUDEN X5R JMK316B106ML D1: ON SEMICONDUCTOR MBR0520 L1: MURATA LQH3C2R2M24 SHDN LOAD CURRENT (mA) EFFICIENCY (%)65 300 500 1930/A TA09b 100 200 400 VIN = 3.3V VOUT = 5V Efficiency 3.3V to 5V, 450mA Step-Up Converter