IC manufacturers Analog Devices
IC manufacturers (103)
- All manufacturers
Analog Devices
Infineon Technologies
Microchip
Onsemi
Renesas
ROHM
STMicroelectronics
Texas Instruments
- 3peak incorporated (35)
- Ablic (23)
- Acco Semiconductor (1)
- Advanced Power (4)
- Allegro Microsystems (100)
- Alpha & Omega Semiconductor (37)
- AnalogySemi (3)
- AnDAPT Inc (204)
- Anpec (13)
- AXElite (2)
- Backward (6)
- Bright Power Semiconductor (1)
- Broadcom (46)
- Cambridge GaN Devices (18)
- Chipanalog Micro (10)
- Cologne Chips (1)
- Convenient Power (1)
- Dialog Semiconductor (12)
- Diodes Incorporated (258)
- Divimath (8)
- Elmos AG (1)
- EPC (140)
- e-Peas Semiconductors (1)
- Eta Solutions Co. Ltd. (9)
- GaN Systems (8)
- GaNPower (3)
- Giantec (1)
- Gstek Wuxi (1)
- Helix Semiconductor (7)
- IKON (1)
- Indie Semiconductor (8)
- Innovision Semiconductor Inc (2)
- Intel (68)
- Inventchip Technology (3)
- ISSI (51)
- JoulWatt (20)
- KDPOF (3)
- Kinetic Technology (8)
- Lattice semiconductor Corporation (38)
- Littelfuse (1)
- Lumissil Microsystems (8)
- M3 Technology (M3Tek) (7)
- Macnica (22)
- Marvell Semiconductor (1)
- MaxLinear (181)
- Menlo Micro (1)
- MikroE (25)
- MindCet (2)
- Monolithic Power Systems (981)
- Navitas Semiconductor Inc (6)
- NewEdge Technologies, Inc. (1)
- Nexperia (267)
- Nisshinbo Micro Device Inc. (10)
- Novosense Micro (1)
- NXP (340)
- O2 Micro International Ltd (10)
- On Bright (7)
- Panasonic (2)
- PN Junction Semiconductor (2)
- Power Integrations (117)
- Powermat (1)
- Pulsiv (19)
- Qorvo (97)
- Realsil SuRealsil(tek) Microelectronics (1)
- Richtek (297)
- Sanken Electric Co., Ltd. (16)
- Sckipio (6)
- Semtech (86)
- SG-Micro (58)
- SiFive (2)
- Silanna Semiconductor (9)
- Silergy Corporation (34)
- Silicon Laboratory Inc. (108)
- Silicontent Technology (59)
- Silvertel (59)
- Skycore Semiconductors (1)
- Skyworks (33)
- Southchip (18)
- Summit Wireless (1)
- Tagore Tech (7)
- Taiwan Semiconductor (1)
- TDK Corporation (1)
- Tempo Semiconductor (1)
- Torex (37)
- Toshiba (27)
- Transphorm (21)
- TransSIP (2)
- Union (21)
- uPI Semiconductor (2)
- Valens Semiconductor (31)
- Wise Integration (3)
- Wolfspeed (23)
- Xilinx (22)
- XL Semiconductor (3)
- XYSemi (62)
Overview
| Topology | Buck-Boost Converter |
| Input voltage | 5-36 V |
| Switching frequency | 200-2000 kHz |
| Output 1 | 30 V / 1 A |
| Output 2 | 30 V / 1 A |
| IC revision | 1 |
Description
Released on LT JournalThe LTR3964 is a dual synchronous step-down DC/DC converter with I2C interface designed to operate as a constant-current and constant-voltage source and is ideal for driving LEDs. The fixed frequency and peak current mode topology result in stable operation over a wide range of supply and output voltages. The ground referred voltage FB pin serves as the input for several LED protection features, and also allows the converter to operate as a constant-voltage source. The maximum output current is set by an external resistor, and the output current amplifier has a rail-to-rail common mode range. LT3964 uses an I2C interface to communicate with a microcontroller to read LED faults, write PWM and analog dimming registers and set fault masking. The I2C PWM input provides LED dimming ratios up to 8192:1. The I2C programmable CTRL register sets the gain of the external CTRL pin, andmaximum current sense threshold, providing additional analog dimming capability.
Features
- Wide Input Voltage Range: 4V to 36V
- Two Independent 1.6A/40V Synchronous Bucks
- I2C Interface for Internal True Color PWM™ Dimming (8192:1), Analog Dimming and Fault Reporting
- 1000:1 External True Color PWM Dimming and10:1 External Analog Dimming
- PMOS Switch Driver for PWM and Output Disconnect
- ±3% Constant Current Regulation
- Adjustable Frequency: 200kHz to 2MHz
- Frequency Synchronization with Clock Output
- Programmable OPENLED Protection with Reporting
- Short-Circuit Protection with Reporting
- Programmable Undervoltage Lockout with Hysteresis
- Internal Compensation
- 9 Unique Device Addresses for I2C
- Available in 5mm × 6mm 36-Lead QFN Package
Typical applications
- Constant-Current, Constant-Voltage Source
- General Purpose, Industrial, Medical and Automotive Lighting
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | fres(MHz) | VOP(V) | Mount | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(mΩ) | Type | IR(A) | Z @ 1 GHz(Ω) | H(mm) | SamplesAvailability & Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-MAPI SMT Power Inductor, 2.2 µH, 2.2 A | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance2.2 µH | Performance Rated Current2.2 A | Saturation Current @ 30%3.55 A | DC Resistance147 mΩ | Self Resonant Frequency60 MHz | Operating Voltage80 V | MountSMT | – | – | – | – | DC Resistance176 mΩ | – | Rated Current1.3 A | – | Height1 mm | –Check availability | |||
 | SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, – | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | MountSMT | Impedance @ 100 MHz600 Ω | Maximum Impedance700 Ω | Maximum Impedance150 MHz | Rated Current 22000 mA | DC Resistance150 mΩ | TypeHigh Current | Rated Current1.5 A | Impedance @ 1 GHz193 Ω | Height0.0009 mm | –Check availability | |||
 | SPECWE-MPSB EMI Multilayer Power Suppression Bead, –, – | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MPSB EMI Multilayer Power Suppression Bead | – | – | – | DC Resistance26.5 mΩ | – | – | MountSMT | Impedance @ 100 MHz180 Ω | Maximum Impedance202 Ω | Maximum Impedance155 MHz | Rated Current 23100 mA | DC Resistance37 mΩ | TypeHigh Current | Rated Current3.1 A | Impedance @ 1 GHz61 Ω | Height0.9 mm | –Check availability |
Availability Forecast
WE item number Packaging unitsLead time
––– weeks
| Expected Availability | Opening inventory | Quantity |
|---|---|---|
| Current Availability | – | – |
There is no forecast for this quantity request.
Does it just not fit? Please contact us.Simply contact our service team for special orders and bulk quantities.Contact us