LT1534-1 LINER [Linear Technology], LT1534-1 Datasheet
LT1534-1
Related parts for LT1534-1
LT1534-1 Summary of contents
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... Low minimum supply voltage and low supply current during shutdown make the LT1534/LT1534-1 well suited for por- table applications. The LT1534/LT1534-1 are available in the 16-pin narrow SO package. , LTC and LT are registered trademarks of Linear Technology Corporation. L3 ...
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... LT1534/LT1534 ABSOLUTE MAXIMUM Input Voltage (V ) .................................................. 30V IN Switch Voltage (COL) .............................................. 35V SHDN Pin Voltage .................................................... 30V Feedback Pin Current (FB) .................................... 10mA Negative Feedback Pin Current (NFB) .................. 10mA U PACKAGE/ORDER INFORMATION TOP VIEW PGND COL 2 15 COL * SYNC VSL ...
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... VSL CSL 17k VSL CSL 17k VSL CSL 17k VSL CSL LT1534/LT1534-1 . COL, SHDN, NFB, all other pins open REF MIN TYP MAX UNITS – 2.550 – 2.500 – 2.420 – 37 – 25 0.002 0.05 1100 1500 1900 700 ...
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... LT1534/LT1534 TYPICAL PERFORMANCE CHARACTERISTICS Minimum Input Voltage ( Temperature 2.70 2.65 2.60 2.55 2.50 2.45 100 125 150 –50 – JUNCTION TEMPERATURE ( C) 1534 G01 Feedback Voltage and Input Current vs Temperature 1.30 1.29 1.28 1.27 1. 1.25 1.24 1. 1.22 1.21 1.20 –50 – 100 125 150 TEMPERATURE ( C) Error Amplifier Transconductance vs Temperature ...
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... G11 Load Regulation 2.0 FIGURE 1 CIRCUIT 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 0 100 200 300 400 500 600 LOAD CURRENT (mA) 1534-1 G13 LT1534/LT1534-1 Load Transient Response I LOAD V OUT V = 3.3V 500 s/DIV 1534 G10 (NODE A) OUT I = 0.1A TO 0.5A LOAD FIGURE 1 CIRCUIT Percent Change in Oscillator Frequency vs Temperature (NPO Cap and Metal Film R) 2 ...
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... PIN FUNCTIONS (LT1534/LT1534-1) COL (Pins 2, 15/Pin 2): These two pins should be con- nected together externally to create the collector of the power switch. The emitter returns to PGND through a sense resistor. Large currents flow into these pins desirable to keep external trace lengths short to minimize radiation ...
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... It is used for C loop compensation, current limit adjustment and soft starting. During normal operation the V between 0.2V and 1.33V. An external clamp may be used for lowering the current limit. A capacitor coupled to an external clamp can be used for soft starting. LT1534/LT1534-1 PGND COL COL OUTPUT DRIVER + – ...
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... LT1534/LT1534-1 U OPERATIO The negative feedback amplifier allows for direct regula- tion of negative output voltages. The voltage on the NFB pin gets amplified by a gain of – 0.5 and driven onto the FB input, i.e., the NFB pin regulates to – 2.5V while the amplifier output internally drives the FB pin to 1.25V as in normal operation ...
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... The FB pin will regulate to this voltage. pins determine CSL Referring to Figure determined by The FB bias current represents a small error and can usually be ignored for values 10k. LT1534/LT1534-1 and R pins are tied together. A resistor VSL CSL PIN OUT R2 ...
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... LT1534/LT1534 APPLICATIONS INFORMATION One word of caution. Sometimes a feedback zero is added to the control loop by placing a capacitor across R1 above. If the feedback zero capacitively pulls the FB pin above the internal regulator voltage (2.4V typ), output regulation may be disrupted. A series resistance with the feedback pin can eliminate this potential problem. ...
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... Specialty Polymer Aluminum: Panasonic has come out with their series CD capacitors. While they are only pin ripple should be available for voltages below 16V, they have very low pin ripple occurs at C ESR and good surge capability. LT1534/LT1534-1 pin reduces C will also reduce V pin ripple, but loop phase VC C ...
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... LT1534/LT1534 APPLICATIONS INFORMATION Input Capacitor The ESR of this capacitor acts with high frequency current components to produce much of the conducted noise of the switcher. Values are typical with ESR less than 0.3 . Place the capacitor close to the IC and inductor. The input capacitor can see a high surge current when a battery of high capacitance source is connected “ ...
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... MBR330 NOTE 1 10 1nF 21.5k 1% 2.49k 1% 9.31k 1% NOTE 1: 25nH TRACE INDUCTANCE OR COILCRAFT B10T L1, L2: COILTRONICS CTX50-4 LT1534/LT1534 12V 50mA + – 12V 50mA OPTIONAL T1: PHILIPS EFD-15-3F3 CORE GAP FOR PRIMARY L = 100 H PIN 10, 16 TURNS 24AWG ...
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... D1: MOTOROLA MBR5320T3 L1: MIDCOM 38440 L2: COILCRAFT B07T L3, L4: SUMIDA CD43-220 U2A, U2B: LT1490 INPUT VOLTAGE 4V TO 12V 4.7 F L1A SHDN COL 4 SYNC 1300pF 3 NOTE 1 PGND LT1534 16.9k VSL CSL GND NFB 1, 9,16 1k 4.99k 33nF 1% 1% ...
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... DWG # 05-08-1610 0.228 – 0.244 (5.791 – 6.197 0.053 – 0.069 (1.346 – 1.752) 0 – 8 TYP 0.014 – 0.019 (0.355 – 0.483) TYP LT1534/LT1534-1 0.386 – 0.394* (9.804 – 10.008 0.150 – 0.157** (3.810 – 3.988 ...
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... Low Noise Step-Down Switching Regulator Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com Low Noise Wide Input Range 5V Supply + 16V COL 10 L2 28nH 1nF 3 LT1534-1 PGND 7. OUT1 GND T VSL CSL 2.49k 5 1 9,16 ...