MAX8734AEEI+
ActiveHIGH-EFFICIENCY, QUAD-OUTPUT, MAIN POWER-SUPPLY CONTROLLERS FOR NOTEBOOK COMPUTERS
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MAX8734AEEI+
ActiveHIGH-EFFICIENCY, QUAD-OUTPUT, MAIN POWER-SUPPLY CONTROLLERS FOR NOTEBOOK COMPUTERS
Technical Specifications
Parameters and characteristics for this part
| Specification | MAX8734AEEI+ |
|---|---|
| Applications | Power Supply Controller |
| Current - Supply | 25 çA |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 C |
| Package / Case | 28-SSOP |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 28-QSOP |
| Voltage - Input [Max] | 24 V |
| Voltage - Input [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | N/A | 216 | $ 15.38 | |
| Tube | 1 | $ 12.01 | ||
| 10 | $ 8.64 | |||
| 25 | $ 8.58 | |||
Description
General part information
MAX8734 Series
The MAX8732A/MAX8733A/MAX8734A dual step-down, switch-mode power-supply (SMPS) controllers generate logic-supply voltages in battery-powered systems. The MAX8732A/MAX8733A/MAX8734A include two pulse-width modulation (PWM) controllers, adjustable from 2V to 5.5V or fixed at 5V and 3.3V. These devices feature two linear regulators providing 5V and 3.3V always-on outputs. Each linear regulator provides up to 100mA output current with automatic linear-regulator bootstrapping to the main SMPS outputs. The MAX8732A/MAX8733A/MAX8734A include on-board power-up sequencing, a power-good (PGOOD) output, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown. Additionally, the outputs are high impedance when VCCfalls below its UVLO set point while the outputs are enabled.Maxim's proprietary Quick-PWM™ quick-response, constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications.The MAX8732A features a 200kHz/5V and 300kHz/3.3V SMPS for highest efficiency, while the MAX8733A features a 400kHz/5V and 500kHz/3.3V SMPS for "thin and light" applications. The MAX8734A provides a pin-selectable switching frequency, allowing either 200kHz/300kHz or 400kHz/500kHz operation of the 5V/3.3V SMPSs, respectively. The MAX8732A/MAX8733A/MAX8734A are available in 28-pin QSOP packages and operate over the extended temperature range (-40°C to +85°C).The MAX8732A/MAX8733A/MAX8734A are pin-for-pin upgrades to the MAX1777/MAX1977/MAX1999. The MAX1999 evaluation kit (EV kit) can be used to evaluate the MAX8732A/MAX8733A/MAX8734A.Applications3- and 4-Cell Li+ Battery-Powered DevicesNotebook and Subnotebook ComputersPDAs and Mobile Communication Devices
Documents
Technical documentation and resources
