HT7722S

HOLTEK Semiconductor Inc.
HT77xxS 100mA PFM Synchronous Step-up DC/DC Converter Features General Description • Low start-up voltage: 0.7V (Typ.) The HT77xxS devices are a high efficiency PFM synchronous step-up DC-DC converter series which are designed to operate with both wire wound chip power inductors and also with multi-layered chip power inductors. The device series have the advantages of extremely low start-up ...
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HT77xxS 100mA PFM Synchronous Step-up DC/DC Converter Features General Description • Low start-up voltage: 0.7V (Typ.) The HT77xxS devices are a high efficiency PFM synchronous step-up DC-DC converter series which are designed to operate with both wire wound chip power inductors and also with multi-layered chip power inductors. The device series have the advantages of extremely low start-up voltage as well as high output voltage accuracy. Being manufactured using CMOS technology ensures ultra low supply current. Because of their higher operating frequency, up to 500 kHz, the devices have the benefits of requiring smaller outline type lower value external inductors and capacitors. The higher operating frequency also offers the advantages of much reduced audio frequency noise. The devices require only three external components to provide a fixed output voltage of 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V or 5.0V. • High efficiency: 1.8V ≤ VOUT ≤ 2.2V upper 80%, 2.7V ≤ VOUT ≤ 5.0V upper 85% (Typ.) • High output voltage accuracy: ±2.5% • Output voltage: 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V, 5.0V • Output current up to 100mA • Ultra low supply current IDD: 4μA (Typ.) • Low ripple and low noise • Low shutdown current: 0.1μA (Typ.) • Package types: 3-pin SOT89, 3-pin SOT23 and 5-pin SOT23 Applications The HT77xxS devices include an internal oscillator, PFM control circuit, driver transistor, reference voltage unit and a high speed comparator. They employ pulse frequency modulation techniques, to obtain minimum supply current and ripple at light output loading. These devices are available in space saving 3-pin SOT89, 3-pin SOT23 and 5-pin SOT23 packages. For SOT23-5 package types, they also include an internal chip enable function to reduce power consumption when in the shutdown mode. • Palmtops/PDAs • Portable communicators/Smartphones • Cameras/Camcorders • Battery-powered equipment Selection Table Part No. Output Voltage HT7718S 1.8V HT7722S 2.2V HT7727S 2.7V HT7730S 3.0V HT7733S 3.3V HT7737S 3.7V HT7750S 5.0V Package Marking SOT89 SOT23 SOT23-5 HT77xxS (for SOT89) 7xxS (for SOT23) 7xxS (for SOT23-5) Note: ″xx″ stands for output voltages. Rev. 1.70 1 December 12, 2018 PDF
Документация на HT7722S 

Дата модификации: 12.12.2018

Размер: 826.8 Кб

24 стр.

HT77xxS 100mA PFM Synchronous Step-up DC/DC Converter Features General Description • Low start-up voltage: 0.7V (Typ.) The HT77xxS devices are a high efficiency PFM synchronous step-up DC-DC converter series which are designed to operate with both wire wound chip power inductors and also with multi-layered chip power inductors. The device series have the advantages of extremely low start-up voltage as well as high output voltage accuracy. Being manufactured using CMOS technology ensures ultra low supply current. Because of their higher operating frequency, up to 500 kHz, the devices have the benefits of requiring smaller outline type lower value external inductors and capacitors. The higher operating frequency also offers the advantages of much reduced audio frequency noise. The devices require only three external components to provide a fixed output voltage of 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V or 5.0V. • High efficiency: 1.8V ≤ VOUT ≤ 2.2V upper 80%, 2.7V ≤ VOUT ≤ 5.0V upper 85% (Typ.) • High output voltage accuracy: ±2.5% • Output voltage: 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V, 5.0V • Output current up to 100mA • Ultra low supply current IDD: 4μA (Typ.) • Low ripple and low noise • Low shutdown current: 0.1μA (Typ.) • 3-pin TO92, 3-pin SOT89, 3-pin SOT23 and 5-pin SOT23 package Applications The HT77xxS devices include an internal oscillator, PFM control circuit, driver transistor, reference voltage unit and a high speed comparator. They employ pulse frequency modulation techniques, to obtain minimum supply current and ripple at light output loading. These devices are available in space saving 3-pin TO92, 3-pin SOT89, 3-pin SOT23 and 5-pin SOT23 packages. For 5-pin SOT23 package types, they also include an internal chip enable function to reduce power consumption when in the shutdown mode. • Palmtops/PDAs • Portable communicators/Smartphones • Cameras/Camcorders • Battery-powered equipment Selection Table Part No. Output Voltage HT7718S 1.8V HT7722S 2.2V HT7727S 2.7V HT7730S 3.0V HT7733S 3.3V HT7737S 3.7V HT7750S 5.0V Package Marking TO92 SOT89 SOT23 SOT23-5 HT77xxS (for TO92) HT77xxS (for SOT89) 7xxS (for SOT23) 7xxS (for SOT23-5) Note: ″xx″ stands for output voltages. Rev. 1.60 1 August 04, 2018 PDF
Документация на HT7750S 

Дата модификации: 13.08.2018

Размер: 848.3 Кб

25 стр.

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