LTC4219 LINER [Linear Technology], LTC4219 Datasheet
LTC4219
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LTC4219 Summary of contents
Page 1
... The power good detection level and foldback current limit profi le are internally preset for 5V (LTC4219-5) and 12V (LTC4219-12) applications. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation ...
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... OUT ............................................ –0. INTV .................................................. –0.3V to 3.5V CC GATE (Note 3) ........................................ –0.3V to 33V Operating Temperature Range LTC4219C ................................................ 0°C to 70°C LTC4219I.............................................. –40°C to 85°C Junction Temperature (Notes 4, 5)........................ 125°C Storage Temperature Range ................... –65°C to 150°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL ...
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... MOSFET On, No Load V Rising DD LTC4219-12, V Rising OUT LTC4219-5, V Rising OUT LTC4219-12 LTC4219 0V 15V OUT GATE 12V, LTC4219-12 OUT GATE 5V, LTC4219-5 OUT GATE V = 1.23V 1.23V 20kΩ FB SET V = 1.2V IN LTC4219-12 LTC4219-5 V Rising 5V, 15V 0mA, –10mA ...
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... LTC4219 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER AC Characteristics Input High (EN1, EN2) to Gate Low t PHL(GATE) Propagation Delay t Short Circuit to Gate Low PHL(ILIM) t Turn-On Delay D(ON) t Circuit Breaker Filter Delay Time (Internal) D(CB) Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device ...
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... V and Temperature 3.3V, 12V 100 –50 – TEMPERATURE (°C) LTC4219 T = 25° 12V unless otherwise noted Current Limit Delay (t vs Overdrive) PHL(ILIM) 1000 100 10 1 0.1 75 100 0 10 OUTPUT CURRENT (A) 4219 G05 Current Limit Adjustment ...
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... LTC4219 TYPICAL PERFORMANCE CHARACTERISTICS PG, FLT V Low vs I OUT LOAD 14 12 FLT (mA) LOAD 4219 G13 Gate Pull-Up Current vs Gate Drive 3. –5 –10 –15 I GATE Gate Drive vs Temperature 6.15 6.14 6.13 6.12 6.11 6.10 –50 – TEMPERATURE (° ...
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... OUT for both the LTC4219-12 and LTC4219-5. These versions preset 12V and 5V foldback and power good levels. If the OUT volt- age falls below 2.5V (LTC4219- (LTC4219-12) the current limit is reduced using a foldback profi le (see the Typical Performance Characteristics section). If the FB voltage falls below 1 ...
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... CM + 1.235V EN1 EN1 – + 1.235V EN2 EN2 – – UVLO1 + 2.73V TIMER * 100k (LTC4219-5) 150k (LTC4219-12) ** 40k (LTC4219-5) 20k (LTC4219-12) 8 SENSE INTERNAL 25mΩ MOSFET CHARGE PUMP INRUSH AND GATE DRIVER OUT LOGIC + 0.2V TM1 – + TM2 – 1.235V GND ...
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... The power good condition is signaled by the PG pin using an open-drain pull-down transistor. The Functional Diagram also shows the monitoring blocks of the LTC4219. The two comparators on the left side in- clude the EN1 and EN2 comparators. These comparators determine if the enable inputs are valid prior to turning on the MOSFET. But fi ...
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... LTC4219 APPLICATIONS INFORMATION The typical LTC4219 application high availability system that uses a positive voltage supply to distribute power to individual cards. A complete application circuit is shown in Figure 1. External component selection is discussed in detail in the following sections. Turn-On Sequence Several conditions must be present before the internal pass MOSFET can be turned on ...
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... The GATE is pulled down with a 170mA current to the OUT pin. Overcurrent Fault The LTC4219 features an adjustable current limit with foldback that protects against short circuits or excessive load current. To prevent excessive power dissipation in the switch during active current limit, the available current is reduced as a function of the output voltage sensed by the FB pin ...
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... Typical Performance Characteristics section. Using a comparator or ADC to measure the I provides an indicator of the MOSFET temperature. There is an over-temp circuit in the LTC4219 that monitors an internal voltage similar to the I the die temperature exceeds 145°C the circuit turns off the MOSFET until the temperature drops to 125°C. ...
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... LTC4219-12, the PG comparator indicates logic high when OUT pin rises above 10.5V. If the OUT pin subsequently falls below 10.3V, the comparator toggles low. On the LTC4219- 5 the PG comparator drives high when the OUT pin rises above 4.35V and low when OUT falls below 4.27V. ...
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... OUT pin Additional Applications The LTC4219 has a wide operating range from 2.9V to 15V. DD The PG threshold is set with an internal resistive divider. All other functions are independent of supply voltage. Figure 7 shows a 5V application with a PG threshold of 4.35V. In addition to Hot Swap applications, the LTC4219 also functions as a backplane resident switch for removable load cards (see the Typical Application section) ...
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... Plastic DFN (5mm × 3mm) (Reference LTC DWG # 05-08-1706) 0.65 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 4.40 ±0.05 (2 SIDES) 5.00 ±0.10 (2 SIDES 0.20 TYP 3.00 ±0.10 1.65 ± 0.10 (2 SIDES) (2 SIDES) 0.75 ±0.05 0.00 – 0.05 LTC4219 R = 0.115 0.40 ± 0.10 TYP 9 16 PIN 1 NOTCH (DHC16) DFN 1103 8 1 0.25 ± 0.05 0.50 BSC 4.40 ±0.10 (2 SIDES) BOTTOM VIEW—EXPOSED PAD 15 4219f ...
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... Dual Hot Swap Controller/Sequencer LTC4230 Triple Channels, Hot Swap Controller LTC4352 0V to 18V Ideal Diode Controller 16 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● OUT 12V LTC4219DHC-12 10k 12V PG 10k 12V FLT 10k EN2 I SET I ADC ...