LT1109A_03 LINER | Alldatasheet

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Flash Memory VPP Generator Adjustable and Fixed 5V, 12V UA OPPLICATITYPICAL Output Voltage VOUT 2V/DIV SHUTDOWN 5V/DIV 500ms/DIV 1109A TA03 12V Output Current OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) 13.0 12.5 12.0 11.5 11.0 10.5 10.0 50 100 150 200 1109A TA02 250 300 VIN = 4.5V VIN = 5V SFEATURE n Uses Off-the-Shelf Inductors n Low Cost n 8-Pin DIP or SO Package n Fixed 5V or 12V Output or Adjustable Version n Only Four External Components Required n 360mA Standby Current n Logic-Controlled Shutdown USA OPPLICATI n Flash Memory VPP Generators n 5V to 12V Converters n 3.3V to 12V Converters n Disk Drives n PC Plug-In Cards n Peripherals n Battery-Powered Equipment The LT1109A is a simple step-up DC/DC converter. The 8- pin DIP or SOIC devices require only four external compo- nents to construct a complete DC/DC converter. Current drain is just 360mA at no load, making the device ideal for cost-sensitive applications where standby current must be kept to a minimum. The LT1109A-12 can deliver 12V at over 150mA from a 5V supply, enough power to program four flash memory chips simultaneously. The LT1109A-5 can deliver 5V at up to 110mA from a 2V input. The devices feature a shutdown pin that turns off the oscillator when taken low. The gated- oscillator design requires no frequency compensation components. High frequency 120kHz operation permits the use of small surface mount inductors and capacitors. D UESCRIPTIO All Surface Mount Flash Memory VPP Generator SENSEVIN PGND GND LT1109ACS8-12 SHUTDOWN SW MBRS130T3 47mF 20V VOUT 12V L1* 33mH COILTRONICS CTX33-2 SUMIDA CD54-330LC 1 = PROGRAM 0 = SHUTDOWN +VIN 22mF 10V 1109A TA01

A UGWA WU WARBSOLUTEX I T I S (Voltages Referred to GND Pin) TJMAX = 90°C, qJA = 150°C/W TOP VIEW S8 PACKAGE 8-LEAD PLASTIC SO *FIXED VERSIONS VIN NC SW PGND FB (SENSE)* SHUTDOWN NC GND LT1109ACS8 LT1109ACS8-5 LT1109ACS8-12 1109A 1109A5 1109A1 LT1109ACN8 LT1109ACN8-5 LT1109ACN8-12 WU UPACKAGE/ORDER I FOR ATIO ORDER PART NUMBER1 TOP VIEW VIN NC SW PGND N8 PACKAGE 8-LEAD PLASTIC DIP *FIXED VERSIONS FB (SENSE)* SHUTDOWN NC GND ORDER PART NUMBER S8 PART MARKING ELECTRICAL C CHARA TERISTICS TA = 25°C, VIN = 3V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Switch Off l 360 500 mA VIN Input Voltage l 29 V Comparator Trip Point Voltage LT1109A l 1.20 1.25 1.30 V VOUT Output Sense Voltage LT1109A-5; 2V £ VIN £ 5V l 4.75 5.00 5.25 V LT1109A-12; 2V £ VIN £ 12V l 11.52 12.00 12.55 V Comparator Hysteresis LT1109A l 8 12.5 mV Output Voltage Ripple LT1109A-5 l 25 50 mV LT1109A-12 l 60 120 mV fOSC Oscillator Frequency 105 120 135 kHz l 95 155 kHz tON Switch On Time 4.1 5.5 6.9 ms l 3.8 7.4 ms DC Duty Cycle Full Load l 60 68 77 % VCESAT Switch Saturation Voltage V IN = 3V, ISW = 650mA l 0.5 0.65 V VIN = 5V, ISW = 1A 0.7 1.00 V Switch Leakage Current V SW = 12V 1 10 mA VIH SHUTDOWN Pin High l 2.0 V VIL SHUTDOWN Pin Low l 0.8 V IIH SHUTDOWN Pin Input Current V SHUTDOWN ‡ 2.0V l 10 mA IL SHUTDOWN Pin Input Current 0V £ VSHUTDOWN £ 0.8V l 20 mA The l denotes specifications which apply over the full operating temperature range. TJMAX = 90°C, qJA = 130°C/W

CCHARA TERISTICSUWATYPICALP E RFOR CE TEMPERATURE (°C) –50 FREQUENCY (kHz) 160 140 120 100 –25 02 5 5 0 1109A G02 75 100 Efficiency Oscillator Frequency Duty Cycle Switch Saturation Voltage Switch Saturation Voltage TEMPERATURE (°C) DUTY CYCLE (%) 1109A G03 –50 –25 0 25 50 75 100 INPUT VOLTAGE (V) 4.2 EFFICIENCY (%) 5.8 1109A G01 4.6 5.0 5.4 4.4 4.8 5.2 5.6 VIN = 5V VOUT = 12V LOAD = 120mA L = 29mH ISWITCH (A) VCESAT (V) 1.2 1109A G04 0.4 0.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.2 0.6 1.0 1.4 VIN = 3V VIN = 2V VIN = 5V TEMPERATURE (°C) VCESAT (V) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1109A G05 –50 –25 0 25 50 75 100 ISW = 650mA Switch On Time TEMPERATURE (°C) SWITCH ON TIME (ms) 1109A G06 –50 –25 0 25 50 75 100 Quiescent Current TEMPERATURE (°C) QUIESCENT CURRENT (mA) 500 450 400 350 300 250 200 1109A G07 –50 –25 0 25 50 75 100 Quiescent Current INPUT VOLTAGE (V) QUIESCENT CURRENT (mA) 500 450 400 350 300 250 1109A G08 4 8 12 2026 10 14 18 TA = 25°C

CCHARA TERISTICSUWATYPICALP E RFOR CE WIDA G R ABLOCK S LT1109A (Adjustable) TEMPERATURE (°C) –50 OUTPUT VOLTAGE (V) 12.3 12.2 12.1 12.0 11.9 11.8 11.7 25 75 1109A G09 –25 0 50 100 125 LT1109A-12 Output Voltage LT1109A-5, LT1109A-12 VIN 1.25V REF 250k COMP R1* SWSENSE DRIVER SHUTDOWN VIN 1.25V REF COMP SWFB DRIVER *LT1109A-5: R1 = 83k LT1109A-12: R1 = 29k 1109A BD 120kHz OSC 120kHz OSC GND PGND PGNDSHUTDOWN Q1 Q1 GND tON (ms) 3.0 OSCILLATOR FREQUENCY (kHz) 160 150 140 130 120 110 100 7.0 1109A G10 0°C £ TA £ 70°C TA= 25°C Minimum/Maximum Oscillator Frequency vs tON

The LT1109A is a micropower step-up DC/DC converter. drops below 1.25V, A1 switches on the 120kHz oscillator. SHUTDOWN low, quiescent current remains at 360mA. equivalent series resistance (ESR) and capacitance value. versions, such as the MBRS130T3, are available as well. Table 1. Inductor Manufacturers Table 2. Capacitor Manufacturers

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2V Powered Flash Memory VPP Generator 3.3V Powered Flash Memory VPP Generator MBRS130T3 33mF** 25V 12V 60mA 20mH* VIN 3.3V 22mF * COILTRONICS CTX20-1 SUMIDA CD54-220LC ** AVX TPS SERIES 1109A TA04 SENSEVIN PGNDGND LT1109A-12 SHUTDOWN SW SHUTDOWN 12V 35mA 10mH*VIN * COILTRONICS CTX10-1 SUMIDA CD54-100LC AVX TPS SERIES 1109A TA05 MBRS130T3 33mF 25V 22mF SENSEVIN PGNDGND LT1109A-12 SHUTDOWN SW SHUTDOWN

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. USA OPPLICATITYPICAL 2V to 5V Converter 5V to 12V Converter with Shutdown to 0V at Output * COILTRONICS CTX10-1 SUMIDA CD54-100LC ** AVX TPS SERIES 1109A TA06 10mH*VIN MBRS130T3 22mF SENSEVIN PGNDGND LT1109A-12 SHUTDOWN SW SHUTDOWN 33mF** 10V 110mA * COILTRONICS CTX33-2 SUMIDA CD54-330LC ** AVX TPS SERIES 1109A TA07 10mH*VIN MBRS130T3 22mF SENSEVIN PGNDGND LT1109A-12 SHUTDOWN SW SHUTDOWN 47mF** 20V VOUT 12V 110mA 1mF 2N4403

Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7487 (408) 432-1900 l FAX: (408) 434-0507 l TELEX: 499-3977 ª LINEAR TECHNOLOGY CORPORA TION 1 993 sn1109A 1109afs LT/GP 0493 10K REV 0 PACKAGE DESCRIPTIOU Dimensions are in inches (millimeters) unless otherwise noted. 8-Lead Plastic DIP 1 2 3 4 0.150 – 0.157 (3.810 – 3.988) 8 7 6 5 0.189 – 0.197 (4.801 – 5.004) 0.228 – 0.244 (5.791 – 6.197) 0.010 – 0.020 (0.254 – 0.508) 0.016 – 0.050 0.406 – 1.270

  • 45° 0°– 8° TYP 0.008 – 0.010 (0.203 – 0.254) SO8 0392 0.053 – 0.069 (1.346 – 1.752) 0.014 – 0.019 (0.355 – 0.483) 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC N8 0392 0.045 ± 0.015 (1.143 ± 0.381) 0.100 ± 0.010 (2.540 ± 0.254) 0.065 (1.651) TYP 0.045 – 0.065 (1.143 – 1.651) 0.130 ± 0.005 (3.302 ± 0.127) 0.020 (0.508) MIN 0.018 ± 0.003 (0.457 ± 0.076) 0.125 (3.175) MIN 0.009 – 0.015 (0.229 – 0.381) 0.300 – 0.320 (7.620 – 8.128) 0.325 +0.025 –0.015 +0.635 –0.3818.255() 12 3 4 87 6 5 0.250 ± 0.010 (6.350 ± 0.254) 0.400 (10.160) MAX 8-Lead Plastic SOIC