40 V boost converter includes a 2 A switch in SMT

20 October 2004 Power Electronics / Power Management Information Security

Linear Technology's LT1935, is claimed to be the industry's highest power switching regulator in SOT-23 package. The device is a 2 A, 40 V, 1,2 MHz step-up DC/DC converter in a ThinSOT package. Its wide 2,3 V to 16 V input voltage range enables the LT1935 to operate from single cell Li-Ion batteries up to fixed 15 V input rails, delivering outputs up to 38 V. Its constant 12 MHz switching frequency allows designers to keep switching noise out of noise-sensitive circuitry and enables the use of tiny capacitors and inductors.

The combination of the LT1935's high efficiency switch and tiny ThinSOT package provides high current boost capability in a very compact form factor, making it ideal for space-constrained applications.

The LT1935's NPN switch achieves a VCESAT of only 180 mV at 2 A, independent of supply voltage, resulting in high efficiency even at maximum power levels from a 3 V input. The high voltage switch on the LT1935 is rated at 40 V, making it suited for boost converters up to 38 V, as well as for single-ended primary inductance converter (SEPIC) and flyback designs.

The device can generate 5 V at up to 1 A from a 3,3 V supply or 5 V at 550 mA from four alkaline cells in a SEPIC design. The LT1935 incorporates a soft-start function and is pin-to-pin compatible with both the LT1930 and LT1613.

Further reading:

Power efficiency and robustness in electronics design
Power Electronics / Power Management
Mouser Electronics recently announced a new eBook in collaboration with Analog Devices highlighting essential strategies for optimising power systems.

Read more...

---

USB Type-C-powered controllers
Future Electronics Power Electronics / Power Management
Diodes Incorporated has released two USB Type-C PD 3.1 extended power range sink controllers that can be embedded into battery-powered devices.

Read more...

---

Multicell battery monitoring
Altron Arrow Power Electronics / Power Management
The LTC6811 from Analog Devices is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1,2 mV.

Read more...

---

Full telemetry in tiny DC-DC converters
RS South Africa Power Electronics / Power Management
The FS160* series of µPOL DC-DC converters from TDK all offer full telemetry, provide increased performance, and are remarkable for extraordinary power density in the smallest sizes.

Read more...

---

Power IC supplies 1650 W
EBV Electrolink Power Electronics / Power Management
Power Integrations has announced a two-fold increase in power output from the HiperLCS-2 chipset with the new device now being able to deliver up to 1650 W of continuous output power.

Read more...

---

High-voltage step-down DC-DC converter
Altron Arrow Power Electronics / Power Management
The MAX17793 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 3 to 80 V.

Read more...

---

High-voltage contactors
RS South Africa Power Electronics / Power Management
TDK Corporation has announced two new additions to its high-voltage contactor portfolio for harsh environments: the HVC43MC with integrated mirror contact and the HVC45 with enhanced short-circuit current handling capability.

Read more...

---

Chokes rated at 36 A
RS South Africa Power Electronics / Power Management
TDK Corporation has launched the EPCOS SurfIND series, a new range of current-compensated ring core double chokes for high currents and surface mounting.

Read more...

---

RF arrestor provides robust protection
RFiber Solutions Power Electronics / Power Management
NexTek’s range of coaxial RF surge and lightning arrestors are designed and built to provide robust protection for any radio or coaxial RF transmission application.

Read more...

---

Wide-Bandgap Developer Forum 2025
Power Electronics / Power Management
To give designers the ultimate in design flexibility, the entire range of WBG power semiconductors will be provided including discretes, modules, and highly integrated solutions ranging from 40 V to 700 V for GaN and 400 V to 3,3 kV for SiC.

Read more...

---