TPS61121

illustrate

The TPS6112x device provides a complete power solution for products powered by a single cell Li-Ion or Li-Polymer or two to 4 alkaline batteries, NiCd or NiMH batteries. These devices can produce two regulated outputs that are either externally regulated by a resistor divider or fixed to the voltage inside the chip. It also provides a maximum output of at least 200 mA for power generation with a supply voltage down to the current 3.3 1.8 V, and the fifth section of Li-Ion or Li-Polymer batteries makes a simple solution for implementing a boost converter that is a fixed-frequency-based, pulse-width modulated (PWM) controller using a synchronous rectifier for maximum benefit. The boost switch with maximum peak current is limited to 1600 mA.

Device usage

• All single or dual batteries or products powered by MP-3 players, PDAs USB, and other portable devices
• Dual input or dual output mode
• Simple 3.3-V conversion for lithium-ion batteries

characteristic

• Synchronous, 95% efficient, enhanced with a 500 mA output 1.8 - V input current converter
• Integrated 200-mA reverse voltage protection LDO DC/DC output voltage after adjustment or second output voltage
• 40μA (typical) total quiescent current device
• Input voltage range: 1.8 - V to 5.5 - V
• Fixed and adjustable output voltage options up to 5.5 - V
• Power saving in low output power to improve efficiency mode
• Battery low voltage comparator
• Power good output
• Low EMI converter (integrated ringing switch)
• Load disconnects during shutdown
• Overtemperature protection
• Available in a small 4mm x 4mm QFN-16 or in a TSSOP-16 package