Sunnyvale, Calif. Maxim Integrated Products introduced the MAX8667/MAX8668, a 4-channel power-management ICs (PMICs) in a 9 mm2 TQFN package. These PMICs minimize total design size by integrating two step-down DC/DC converters and two low-input, low-dropout regulators (LDOs), as well as all feedback networks. They use a 1.5 MHz switching frequency to enable the use of small external components, including 0805-size 2.2 µH inductors. The MAX8667/MAX8668 are suitable for cell phones, PDAs and other space-constrained, handheld applications.
The PMICs extend battery life by integrating a synchronous rectifier in each DC/DC converter in order to achieve up to 93% efficiency, while drawing 100 µ (typical) quiescent current with all regulators enabled. One of the DC/DC converters delivers up to 1.2 A output current, while the other delivers up to 600 mA. The low-input LDOs operate down to 1.7 V input, saving 80% of total power loss in the system as compared with conventional linear-regulator solutions. The output voltages of the DC/DC converters are adjustable from 0.6 V to 3.3 V (MAX8668) or factory preset (MAX8667). The output voltages of the low-noise LDOs are all factory preset to eliminate the need for an external feedback network. The PMICs are specified for the extended temperature range of -40°C to 85°C.
Pricing: Begins at $2.95 each in 2,500-piece quantities
Data Sheet: MAX8667/MAX8668
Maxim Integrated Products, 408-737-7600, www.maxim-ic.com