LT1930 Linear Technology, LT1930 Datasheet
LT1930
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LT1930 Summary of contents
Page 1
... PWM architecture results in low, predictable output noise that is easy to filter. Low ESR ceramic capacitors can be used at the output, further reducing noise to the millivolt level. The high voltage switch on the LT1930/LT1930A is rated at 36V, making the device ideal for boost converters up to 34V as well as for single-ended primary inductance converter (SEPIC) and flyback designs ...
Page 2
... SHDN Pin Bias Current V SHDN V SHDN 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 Specifications over the – PACKAGE/ORDER I FOR ATIO SW 1 GND 2 ...
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... Ground to shut down. V (Pin 5): Input Supply Pin. Must be locally bypassed. IN LT1930/LT1930A SHDN Pin Current 90 80 LT1930A LT1930 – SHDN PIN VOLTAGE (V) 1930/A G03 Oscillator Frequency 2.5 2.3 LT1930A 2.1 1.9 1.7 1.5 1.3 LT1930 1.1 0.9 0.7 0.5 –50 – 100 TEMPERATURE ( C) 1930/A G06 3 ...
Page 4
... If the error amplifier’s output increases, more current is delivered to the output decreases, less current is delivered. The LT1930 has a current limit circuit not shown in Figure 2. The switch current is constantly monitored and not al- lowed to exceed the maximum switch current (typically 1 ...
Page 5
... INDUCTOR SELECTION Several inductors that work well with the LT1930 are listed in Table 1 and those for the LT1930A are listed in Table 2. These tables are not complete, and there are many other manufacturers and devices that can be used. Consult each ...
Page 6
... Ceramic capacitors also make a good choice for the input decoupling capacitor, which should be placed as close as possible to the LT1930/LT1930A 4.7 F input capacitor is sufficient for most applications. Table 3 shows a list of several ceramic capacitor manufacturers. Consult the manufacturers for detailed information on their entire selection of ceramic parts ...
Page 7
... Figure 5. Transient Response of Step-Up Converter with 33 F Tantalum Output Capacitor and No Phase Lead Capacitor DIODE SELECTION A Schottky diode is recommended for use with the LT1930/ LT1930A. The Motorola MBR0520 is a very good choice. Where the switch voltage exceeds 20V, use the MBR0530 (a 30V diode) ...
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... LOAD CURRENT (mA) 1930 TA02b 5V to 24V Boost Converter 4.7 F 665k LT1930 4 3 SHDN SHDN FB R2 GND 36.5k 2 C1: TAIYO-YUDEN X5R EMK316BJ475ML C2: TAIYO-YUDEN X5R JMK212BJ475MG D1: ON SEMICONDUCTOR MBR0530 L1: SUMIDA CR43-100 D1 15V 70mA R1 147k C2 2 ...
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... C2: TAIYO-YUDEN X5R LMK212BJ225MG D1: ON SEMICONDUCTOR MBR0520 L1: SUMIDA CR43-4R7 M1: SILICONIX Si6433DQ V OUT 5V 480mA R1 40. 13.3k 1930/A TA07a V OUT 12V 250mA R1 115k C2 2 13.3k 1930/A TA08a LT1930/LT1930A V OUT 8V C3 520mA 47pF 240mA 1930/A TA06 Efficiency 3. 2. ...
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... C4: X5R OR X7R, 25V D1- D4: BAT54S OR EQUIVALENT D5: MBR0520 OR EQUIVALENT L1: PANASONIC ELT5KT4R7M 8V, 23V, –8V Triple Output TFT-LCD Bias Supply with Soft-Start LT1930 SS 30k 4 V SHDN 3.3V GND 1N4148 68nF C1: X5R OR X7R, 6.3V C2-C4, C7, C8: X5R OR X7R, 10V ...
Page 11
... LTC DWG # 05-08-1635) 2.60 – 3.00 1.50 – 1.75 (.102 – .118) (.059 – .069) (NOTE 3) PIN ONE .95 (.037) REF A2 A .09 – .20 (.004 – .008) (NOTE 2) LT1930/LT1930A 2.80 – 3.10 (.110 – .118) (NOTE 3) .25 – .50 (.010 – .020) (5PLCS, NOTE 2) 1.90 A1 (.074) REF S5 SOT-23 0401 11 ...
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... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com 3.3V to 5V, 450mA Step-Up Converter 2.2 F 30.1k LT1930A 4 3 SHDN SHDN FB GND R2 10k 2 C1: TAIYO-YUDEN X5R LMK212BJ225MG C2: TAIYO-YUDEN X5R JMK316B106ML D1: ON SEMICONDUCTOR MBR0520 L1: MURATA LQH3C2R2M24 1930 F03 V OUT ...