ltc1174hv Linear Technology Corporation, ltc1174hv Datasheet
ltc1174hv
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ltc1174hv Summary of contents
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... For applications requiring higher output current or ultra- high efficiency, see the LTC1148 data sheet. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. + 15µF* 25V × ...
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... LTC1174 LTC1174-3.3/LTC1174 ABSOLUTE AXI U RATI GS (Voltage Referred to GND Pin) Input Supply Voltage (Pin 6) LTC1174 ........................................... – 0.3V to 13.5V LTC1174HV ...................................... – 0.3V to 18.5V Switch Current (Pin 5) .............................................. 1A Switch Voltage (Pin 5) LTC1174 ................................................. V LTC1174HV ............................................ V U PACKAGE/ORDER I FOR ATIO TOP VIEW OUT OUT GND 4 N8 PACKAGE ...
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... Regulated Value OUT Minimum Voltage at Pin 8 for Device to Be Active Maximum Voltage at Pin 8 for Device Shutdown LTC1174 12V SHUTDOWN LTC1174HV 16V SHUTDOWN 0 ≤ V ≤ 0.8V SHUTDOWN ≤ 85°C. LTC1174I and LTC1174HVI Only. A CONDITIONS LTC1174I/LTC1174HVI V = 0.4V (LTC1174I) LBOUT V = 0.4V (LTC1174HVI) LBOUT (LTC1174I) ...
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LTC1174 LTC1174-3.3/LTC1174-5 ELECTRICAL CHARACTERISTICS Note 3: Guaranteed by design. Note 4: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Load Current 100 95 ...
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... ACTIVE MODE 450 400 PGM IN 350 300 250 200 SLEEP MODE 150 100 25° INPUT VOLTAGE (V) 1174 G12 Off-Time vs Output Voltage LTC1174-5 LTC1174HV-5 10 LTC1174-3.3 LTC1174HV-3 OUTPUT VOLTAGE (V) 1174 G15 1174fe 5 ...
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LTC1174 LTC1174-3.3/LTC1174 CTIO (Pin 1): For the LTC1174, this pin connects to the OUT FB main voltage comparator’s input. On the LTC1174-3.3 and LTC1174-5 this pin goes to an internal resistive ...
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... RIPPLE By choosing a smaller inductor, a low ESR output filter capacitor has to be used (see C loss will also increase (see Inductor Core Selection section) due to higher ripple current. Burst Mode is a registered trademark of Linear Technology Corporation. until its voltage drops LTC1174 − ⎛ ...
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LTC1174 LTC1174-3.3/LTC1174 APPLICATIO S I FOR ATIO Inductor Core Selection With the value of L selected, the type of inductor must be chosen. Basically there are two kinds of losses in an inductor, core and copper Core losses ...
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U U APPLICATIO S I FOR ATIO Catch Diode Selection The catch diode carries load current during the off-time. The average diode current is therefore dependent on the P-channel switch duty cycle. At high input voltages the diode conducts most ...
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... LB V OUT OUT PGM 50µH** LTC1174HV-5 GND MBRS140T3 4 AVX TPSD476K016 * COILTRONICS CTX50-4 ** Figure 5. Positive-to-Negative 5V Converter output voltage is now taken off the GND pin. Therefore, the maximum input voltage is now determined by the difference between the absolute maximum voltage rating and the output voltage ...
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U U APPLICATIO S I FOR ATIO Board Layout Checklist When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the LTC1174. These items are also illustrated graphically in the layout diagram ...
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LTC1174 LTC1174-3.3/LTC1174 APPLICATIO S I FOR ATIO Solving for L in the above equation and with 44.8µH. The next higher standard value 50µH (example: Coiltronics CTX50-4). The operating frequency, neglecting voltage across ...
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U TYPICAL APPLICATIO Step-Down Regulator with Low-Battery Detection LOW-BATTERY INDICATOR * IS SET TO TRIP 5.5V IN AVX TPSD476K016 ** = MBRS140T3 (SURFACE MOUNT) D1 1N5818 † L1 SELECTION MANUFACTURER PART NO. TYPE ...
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... Positive-to-Negative (– 5V) Converter INPUT VOLTAGE 4V TO 12.5V I (mA) OUT MAX 110 4.7K 140 170 *LOW PGM 200 BATTERY 235 INDICATOR 2 LB 280k OUT LTC1174HV 43k 0.1µF 6.8nF V OUT 3V 450mA 42k + 100µF** 10V ×2 30k 1174 TA05 + 10µF** 6 0.1µF 35V ...
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... GA10-472K THROUGH HOLE LTC1174-3.3/LTC1174-5 Positive-to-Negative (– 3.3V) Converter INPUT VOLTAGE 4V TO 13.5V (mA) OUT MAX 4.7K 175 *LOW- 7 205 I PGM BATTERY 230 INDICATOR 2 255 LB OUT 220k LTC1174HV-3 43k Negative Boost Converter SHUTDOWN PGM OUT OUT LTC1174-3 ...
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LTC1174 LTC1174-3.3/LTC1174-5 U TYPICAL APPLICATIO S INPUT VOLTAGE 6V TO 12.5V * SANYO OS-CON AVX TPSD476K016 ** = MBRS140T3 (SURFACE MOUNT) D1 1N5818 † L1 SELECTION MANUFACTURER PART NO. TYPE COILTRONICS CTX50-3 SURFACE MOUNT COILCRAFT DT3316-473 SURFACE MOUNT SUMIDA CD54-470 ...
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... LTC1174-3.3/LTC1174 5V, – 5V Outputs INPUT VOLTAGE 4V TO 12. SHUTDOWN PGM OUT LTC1174HV OUT GND L1B 4 100µH MBRS140T3 9V to 12V, – 12V Outputs INPUT VOLTAGE 4V TO 12. 0.1µ SHUTDOWN PGM 1 ...
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... LTC1174 GND 100k 4 Buck-Boost Converter INPUT VOLTAGE 4V TO 12V SHUTDOWN PGM OUT 3.3µF** LTC1174HV OUT 4 GND † L2A L1A 4 100µ † OUT 50µH 5V 0mA TO + 320mA 100k 100µF* 1N5818 16V 36.5k ...
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... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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. ...
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... OUT 4 NiCAD BATTERY † L1 150k + 50µH 100µF** 10V 33k 1174 TA15 Output Ripple, SOT-23 Package P-P = 135µ 1.25V Q OUT = 5V, 2.65V to 10V = 10µ 1006 REV E • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1994 1174fe ...