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Overview
| Topology | Boost Converter |
| Input voltage | 3-25 V |
| Switching frequency | 1800-2200 kHz |
| Output 1 | 28 V / 2 A |
| IC revision | A |
Description
The LT®8335 is a current mode DC/DC converter capableof generating either positive or negative output voltagesusing a single feedback pin. It can be configured as aboost, SEPIC or inverting converter consuming as low as6µA of quiescent current. Low ripple Burst Mode operationmaintains high efficiency down to very low outputcurrents while keeping the output ripple below 15mV ina typical application. The internally compensated currentmode architecture results in stable operation over a widerange of input and output voltages. Integrated soft-startand frequency foldback functions are included to controlinductor current during start-up. The 2MHz operationcombined with the small 8-lead DFN package, enableslow cost, area efficient solutions
Features
1) 3V-25V Input Voltage Range2)Ultrlow Quiescent Current and Low Ripple Burst Mode Operation:Iq=6uA3) 2A,28V Power Switch4) Positive or Negative Output Voltage Programming with a single feedback Pin5) Fixed 2MHz Switching Frequency6) Programmable Undervoltage Lockout (UVLO)Internal Compensation and Soft-Start7) Low Profile(0.75mm) 8-Lead(3mmx2mm) DFN Package
Typical applications
- Industrial and Automotive
- Medical Diagnostic Equipment
- Telecom
- Portable Electronics
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC(mΩ) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | Mount | L1(µH) | L2(µH) | IR(A) | IR 2(A) | ISAT(A) | RDC1 typ(Ω) | RDC2 typ(Ω) | RDC1 max(Ω) | RDC2 max(Ω) | fres(MHz) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LHMI SMT Power Inductor, 0.47 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance0.47 µH | – | – | – | Performance Rated Current8.7 A | Saturation Current @ 10%10.4 A | Saturation Current @ 30%19.6 A | DC Resistance14 mΩ | MountSMT | – | – | – | – | – | – | – | – | – | Self Resonant Frequency122 MHz | – | ||||
 | WE-DD SMT Shielded Coupled Inductor, 1.8 µH, 4.7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-DD SMT Shielded Coupled Inductor | Inductance1.8 µH | Rated Current4.7 A | Saturation Current6.5 A | – | – | – | – | DC Resistance34 mΩ | – | Inductance 11.8 µH | Inductance 21.8 µH | Rated Current4.7 A | Rated Current 24.7 A | Saturation Current6.5 A | DC Resistance 10.025 Ω | DC Resistance 20.025 Ω | DC Resistance 10.034 Ω | DC Resistance 20.034 Ω | Self Resonant Frequency58 MHz | TypeStraight | ||||
 | WE-LQS SMT Power Inductor, 3.3 µH, 3.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance3.3 µH | Rated Current3.4 A | Saturation Current4.3 A | DC Resistance24 mΩ | – | – | – | – | MountSMT | – | – | – | – | – | – | – | – | – | Self Resonant Frequency48 MHz | – | ||||
| WE-LQS SMT Power Inductor, 3.3 µH, 3.48 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance3.3 µH | Rated Current3.48 A | Saturation Current4.5 A | DC Resistance25 mΩ | – | – | – | – | MountSMT | – | – | – | – | – | – | – | – | – | Self Resonant Frequency59 MHz | – | ||||
750316134 | Power Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Power Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |