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ANALOG DEVICES LTC3858IUH-2#PBF
DC/DC Controller, Synchronous Buck (Step Down), 4V to 38V, 2 Outputs, 835kHz, QFN-EP-32
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- Manufacturer:
- ANALOG DEVICES ANALOG DEVICES
- Manufacturer Part No:
- LTC3858IUH-2#PBF
- Order Code:
- 4409567
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- Technical Datasheet:
- LTC3858IUH-2#PBF Datasheet
- ECAD / MCAD
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Product Overview
LTC3858IUH-2#PBF is a low IQ, dual 2-phase synchronous step-down controller. It is a high-performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant-frequency current mode architecture allows for a phase-lockable frequency of up to 850KHz. Power loss and noise due to the input capacitor ESR are minimized by operating the two controller outputs out of phase. The 170μA no-load quiescent current extends operating life in battery-powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3858-2 differs from the LTC3858 by having the overvoltage protection crowbar and short-circuit latch off disabled. Independent soft-start pins for each controller ramp the output voltages during start-up. Applications include automotive systems, battery-operated digital devices, and distributed DC power systems.
- Input DC supply current is 8μA typ (shutdown, RUN1, 2 = 0V, TA = 25°C)
- Input supply operating voltage range from 4 to 38V (TA = 25°C), no current foldback during start-up
- Wide output voltage range from 0.8V ≤ VOUT ≤ 24V
- RSENSE or DCR current sensing, OPTI-LOOP ® Compensation minimizes COUT
- Out-of-phase controllers reduce required input capacitance and power supply induced noise
- Programmable frequency range from 375 to 505KHz (RFREQ = 65k, PLLIN/MODE = DC Voltage)
- Selectable continuous, pulse-skipping or Burst Mode® operation at light loads
- Very low dropout operation 99% duty cycle, adjustable output voltage soft-start or tracking
- Power good output voltage monitor, internal LDO powers gate drive from VIN or EXTVCC
- 32 lead plastic QFN package, operating junction temperature range from -40°C to 125°C
Footnotes
ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party
Product Information
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- Current
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- 4V
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- 38V
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- 2Outputs
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- 99%
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- QFN-EP
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- 32Pins
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- 835kHz
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- Synchronous Buck (Step Down)
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- -40°C
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- 125°C
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- -
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Technical Documents (1)
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72 deliver in 3-4 business days from our UK warehouse
Due to market conditions delivery times are for general guidance only and may be subject to change at short notice
¥2,151.58
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¥2,366.74
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| 1+ | ¥2,151.58 (¥2,366.74) | ( ) |
| 10+ | ¥1,645.51 (¥1,810.06) | ( ) |
| 73+ | ¥1,474.55 (¥1,622.01) | ( ) |
| 146+ | ¥1,279.29 (¥1,407.22) | ( ) |
| 292+ | ¥1,181.88 (¥1,300.07) | ( ) |
| 511+ | ¥1,128.40 (¥1,241.24) | ( ) |
| 1022+ | ¥1,087.59 (¥1,196.35) | ( ) |
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