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Analog Devices LT8652S | Demoboard DC2523A
Dual Channel 8.5A, 18V, Synchronous Step-Down Silent Switcher with 16µA Quiescent Current
Details
| Topologie | Abwärtswandler |
| Eingangsspannung | 3.6-18 V |
| Schaltfrequenz | 1850-2150 kHz |
| Ausgang 1 | 1.25 V / 12 A |
| Ausgang 2 | 3.43 V / 12 A |
Beschreibung
The LT®8652S is a dual step-down regulator that delivers up to 8.5A of continuous current from both channels and supports loads up to 12A from each channel. The LT8652S uses second generation Silent Switcher technology including integrated bypass capacitors to deliver a high frequency, high efficiency, small solution with excellent EMI performance. The LT8652S is ideal for noise sensitive applications such as PLLs and high bandwidth data and communications systems. The fast, clean, low overshoot switching edges enable high efficiency operation even at high switching frequencies, enabling a wide control loop bandwidth for fast transient response. Output current monitoring and limiting allows inductors to be selected for the maximum output current in a given application. Differential output voltage sensing provides accurate voltage regulation at the point of load for high current applications. The two channels can be combined to deliver 17A, and two LT8652S ICs can be combined for a 4-phase, 34A supply.
Eigenschaften
- Silent Switcher®2 Architecture:
- Ultralow EMI on Any PCB
- Eliminates PCB Layout Sensitivity
- Internal Bypass Capacitors Reduce Radiated EMI
- Spread Spectrum Frequency Modulation
- 8.5A DC from Each Channel Simultaneously
- Up to 12A on Either Channel
- Ultralow Quiescent Current Burst Mode® Operation:
- 16µA IQ Regulating 12VIN to 3.3VOUT (Both Channels)
- Output Ripple <10mVP-P
- ±1.2% 600mV Feedback Voltage with Remote Sense
- Output Current Monitor Pins with Current Limiting
- Forced Continuous Mode
- CLKOUT for Up to 4-Phase Operation
- 93.6% Efficiency at 6A, 3.3VOUT from 12VIN at 1MHz
- 85.6% Efficiency at 6A, 1.0VOUT from 12VIN at 1MHz
- Fast Minimum Switch-On Time: 20ns
- Adjustable and Synchronizable: 300kHz to 3MHz
- Small 4mm × 7mm 36-Pin LQFN Package
- AEC-Q100 Qualification for Automotive Applications in Progess
Typische Anwendungen
- 1
- Server Power Applications / General Purpose Step-Down
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | f(mm) | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Z @ 100 MHz(Ω) | Zmax(Ω) | Testbedingung Zmax | IR(mA) | Z @ 1 GHz(Ω) | H(mm) | Typ | Pins | Montageart | L(mm) | Arbeitsspannung(V (AC)) | Betriebstemperatur | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-MPSB EMI Multilayer Power Suppression Bead, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-MPSB EMI Multilayer Power Suppression Bead | – | – | – | – | – | Gleichstromwiderstand6 mΩ | – | Impedanz @ 100 MHz100 Ω | Maximale Impedanz160 Ω | Maximale Impedanz1100 MHz | Nennstrom8000 mA | Impedanz @ 1 GHz150 Ω | Höhe2.3 mm | TypHochstrom | – | MontageartSMT | Länge4.5 mm | – | Betriebstemperatur -55 °C up to +125 °C | ||||
 | WE-LHMI SMT Speicherdrossel, –, 0.33 µH | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | – | Induktivität0.33 µH | Performance Nennstrom15.1 A | Sättigungsstrom 115 A | Sättigungsstrom @ 30%29.3 A | Gleichstromwiderstand5 mΩ | Eigenresonanzfrequenz120 MHz | – | – | – | – | – | Höhe2.8 mm | – | Pins2 | MontageartSMT | Länge5.7 mm | – | Betriebstemperatur -40 °C up to +125 °C | ||||
 | WA-SNSR Self-Retaining Spacer, 4.8 mm, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWA-SNSR Self-Retaining Spacer | Bohrung in Blende4.8 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Länge11.1 mm | – | Betriebstemperatur -30 °C up to +85 °C | |||
 | WR-PHD Kurzschlussbrücken, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-PHD Kurzschlussbrücken | – | – | – | – | – | – | – | – | – | – | Nennstrom3000 mA | – | – | – | Pins2 | – | – | Arbeitsspannung200 V (AC) | Betriebstemperatur -25 °C up to +105 °C | |||
 | WR-PHD Stiftleisten, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-PHD Stiftleisten | – | – | – | – | – | – | – | – | – | – | Nennstrom2000 mA | – | – | TypGerade | Pins3 | MontageartTHT | Länge6 mm | Arbeitsspannung200 V (AC) | Betriebstemperatur -40 °C up to +105 °C | |||
 | WR-PHD Stiftleisten, –, – | Simulation– | Downloads7 Dateien | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-PHD Stiftleisten | – | – | – | – | – | – | – | – | – | – | Nennstrom2000 mA | – | – | TypGerade | Pins8 | MontageartTHT | Länge8 mm | Arbeitsspannung200 V (AC) | Betriebstemperatur -40 °C up to +105 °C |