Sunnyvale, Calif. — Maxim Integrated Products has introduced the MAX8844 and MAX8845 28-V, dual-/single-input, linear Li+ battery chargers with battery detection and overvoltage-protected outputs. Maxim said these devices enhance flexibility by providing resistor-adjustable fast-charge and top-off current thresholds. In addition, an autobooting assistant circuit distinguishes input sources and battery connection, and also provides an enable signal for system booting.
The MAX8844 offers two overvoltage-protected LDO outputs for supplying low-voltage-rated USB or charger inputs, while the MAX8845 has a single overvoltage-protected LDO output. This integration eliminates the need for external overvoltage-protection (OVP) ICs, said Maxim. Both devices integrate a battery-pack detection circuit that disables the charger when the battery pack is absent. Target applications include cell phones and smartphones.
The MAX8844 is packaged in a 3 x 3-mm, 14-pin TDFN, while the MAX8845 is available in a 3 x 3-mm, 12-pin TQFN package.
Pricing: Starts at $1.42 (1000-up, FOB USA). User-friendly evaluation kits are available to speed designs.
Resources: MAX8844Y datasheet and MAX8845Y datasheet.