Component Specifier: Control Devices

July 5, 2004

4 min read


CONTROL DEVICES
TYPE/Model	Features	P & A	Source
PWM CONTROLLERS MAX5070A/MAX5070B	Pin-compatible with the UC2842/UCC2842 and UC2844/UCC2844 families; single-ended, current-mode; designed for isolated telecom dc-dc or universal offline-input ac-dc power supplies; externally programmable switching frequency from 20 kHz to 1 MHz; typical 35-µA startup current; -40°C to 125°C operating temperature; eight-pin small-outline and µMAX packages	Starts at $0.61 in 1000-unit lots; available now	Maxim Integrated Products www.maxim-ic.com (800) 998-8800
HIGH-VOLTAGE PWM CONTROLLER LM5033	Operates from 15- to 100-V input voltages; meets Intermediate Bus Architecture (IBA) specs; suits telecom, automotive, and industrial applications; less than 100-ns propagation delay on current limit; 15-A MOSFET drivers; switching frequency set by a single resistor; comes in 10-lead 4-by-4-mm leadless leadframe package (LLP)	$1.10 in 1000-unit lots; available now	National Semiconductor www.national.com (408) 721-5000
HIGH-EFFICIENCY PWM CONTROLLER UCC2540	Designed for multiple-output power supplies; dual ±3-A totem-pole outputs; improves power efficiency by up to 4%; drives two external n-channel MOSFETS synchronously at up to 1 MHz; tracking function for sequencing multiple outputs; 2.7- to 35-V input supply voltage; operates from a 3.3-V bus; operates from -40°C to 105°C; available in 20-pin HTSSOP PowerPAD package	$1.85 in 1000-unit lots; shipping now in volume	Texas Instruments www.ti.com (800) 477-8924
MULTIPHASE PWM CONTROLLER Endura ISL6564	Four-phase, synchronous-buck PWM controller for dc-dc applications; switching frequency ranges up to 1.5 MHz per phase; includes self-clocked, 6-bit voltage identification; output voltage down to 0.525 V; has pin for offset programming of output voltage; choice of R_DS(ON) or direct-current-resistance (DCR) current sensing; 40-pin, 6- by 6-mm quad flat no-lead package	$1.95 in 100- to 999-unit lots; available now	Intersil Corp. www.intersil.com (888) INTERSIL
MULTIPHASE CONTROLLER/DRIVER CHIP SET FAN5019/FAN5009	VRM10.x-compliant; allows the regulator to scale from two, three, or four phases; converges a 12-V main supply into the core supply voltage; delivers up to 140 A for the CPU core from a 12-V input; temperature-compensated inductor current sensing measures current and sets and maintains the loadline; 0°C to 85°C operation; features undervoltage, overvoltage, crowbar, short-circuit protection	FAN5019 costs $1.39, FAN5009 costs $0.60, both in 1000-unit lots; available now	Fairchild Semiconductor www.fairchildsemi.com (972) 910-8000
HOT-SWAP CONTROLLER ADM1073	Enables safe board insertion and removal from a live -48-V backplane; dual overvoltage and undervoltage pins with variable hysteresis; programmable soft starting of the current profile; time-based foldback for additional field-effect-transistor protection; five additional logic I/O flags, including SHUTDOWN and RESTART; operates from -80 V and tolerates transient voltages up to -200 V	$2.00 in 1000-unit lots; production quantities available now	Analog Devices www.analog.com (800) 262-5643
DUAL TWO-PHASE DC-DC CONTROLLER LTC3737	Two-phase, two-channel step-down switching controller; output tracking ensures proper startup of multiple voltage systems; drives an external p-channel MOSFET; switching frequency programmable to 750 kHz; input voltage from 2.7 to 9.8 V; operates from -40°C to 85°C; housed in a 24-pin, 4- by 4-mm quad-flat no-lead package	Starts at $3.65; five weeks	Linear Technology www.linear.com (408) 432-1900
FOUR-CHANNEL VOLTAGE CONTROLLER SMM465	Its active dc output control function intelligently maintains the output voltage of up to four dc-dc converters, improving voltage accuracy in ongoing system use; configurable to sequence up to four voltage supplies in any order during power-up and power transitions; accessible via I²C bus; housed in a thin-quad flat-pack surface-mount package	$6.30 in 10,000-unit lots; available now	Summit Microelectronics www.summitmicro.com (408) 436-9890