(Hong Kong)
Product Summary
The ht7750a is a PFM step-up DC/DC converter with high efficiency and low ripple. The ht7750a features extremely low start-up voltage and high output voltage accuracy. They require only three external components to provide a fixed output voltage of 2.7V, 3.0V, 3.3V or 5.0V. CMOS technology ensures ultra low supply current and makes them ideal for battery-operated applications powered from one or more cells. The ht7750a consists of an oscillator, a PFM control circuit, a driver transistor, a reference voltage unit, and a high speed comparator. The ht7750a employs pulse frequency modulation (PFM) for minimum supply current and ripple at light output loading. These devices are available in space saving TO-92, SOT-89, SOT-23 and SOT-25 packages. For SOT-25 package, it also build-in a chip enable function to reduce power consumption during shutdown mode.
Parametrics
ht7750a absolute maximum ratings: (1)Supply Voltage:VSS-0.3V to VSS+7V ; (2)Storage Temperature:-50℃ to 125℃; (3)Operating Temperature:-40℃ to 85℃.
Features
ht7750a features: (1)Low start-up voltage: 0.7V (Typ.), 0.9V (Max.); (2)High efficiency: 85% (Typ.), VOUT≥2.7V; (3)High output voltage accuracy: ±2.5%; (4)Ultra low supply current IDD2: 4μA (Typ.); (5)Low ripple and low noise; (6)Low shutdown current: 0.5μA (Typ.).
Diagrams
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 HT7750A |
Other |
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Data Sheet |
Negotiable |
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