中文
EnglishThe APW7277 is a synchronous rectifier, fixed switching frequency (1.2MHz typical), and current-mode step-up regulator. The device allows use of small inductors and output capacitors for USB device
Features
92% Effiicency Synchronous Boost Converter With
1000-mA Output Current From 1.8V Input
Stable with Low ESR Output Capacitors
Fixed 1.2MHz Oscillator Frequency
Low EMI Converter (Integrated Anti-Ringing
Function)
Low Battery Output
Integrated Power Save Mode Operation to Improve
Light Load Efficiency
Load Disconnected During Shutdown
Output Current-Limit Protection
Over Temperature Protection
Under Voltage Protection
Enable/Shutdown Function
Available in TQFN4x4-16 and DFN3x3-12 Packages
Lead Free and Green Devices Available
(RoHS Compliant)
General Description
The APW7277 is a synchronous rectifier, fixed switching
frequency (1.2MHz typical), and current-mode step-up
regulator. The device allows use of small inductors and
output capacitors for USB devices. The current-mode
control scheme provides fast transient response and
good output voltage accuracy.
At light loads, the APW7277 will automatically enter in
Pulse Frequency Modulation (PFM) operation to reduce
the dominant switching losses. During PFM operation,
the IC consumes very low quiescent current and
maintains high efficiency over the complete load range.
The APW7277 also includes current-limit and over-
temperature shutdown to prevent damage in the event
of an output overload.
The APW7277 is available in 4mmx4mm TQFN4x4-16
and DFN3x3-12 packages.
Part_No | Package & Pins | Topology | Architecture | Input Voltage (V) | Max Adj. Output Voltage(V) | Switch Current Limit (max)(A) | Fixed Output Voltage (V) | Switching Frequency (kHz) | Internal Power Switch | Sync. Rectifier | ||
min | max | min | max | |||||||||
APW7079 | SOT-89 | Boost | VM Hysteresis | 0.9 | 5.5 | 2.5 | 5.5 | 0.5 | 1.8 | - | No | Yes |
APW7078 | MSOP-8 | Boost | VM | 2.5 | 5.5 | 2.5 | - | - | - | 200 ~ 1000 | No | No |
APW7075 | TSSOP-8 | Boost | VM | 1 | 5.5 | 2.5 | 5 | 1 | 2.5 | 300 | Yes | Yes |
APW34063 | SOP-8 | Boost | CM | 3 | 40 | 1.25 | 40 | 1.5 | - | 33 ~ 100 | Yes | No |
APW7130/1/2 | TQFN5x5-32 | Boost | CM | 2.5 | 6.5 | 2.5 | 18 | 3 | No | 1200 | Yes | No |
APW7237 | TSOT-23-5 | Boost | CM | 2.5 | 6 | 2.5 | 20 | 2 | - | 1500 | Yes | No |
APW7277 | TQFN4x4-16 | Boost | CM | 1.8 | 5.5 | 2.7 | 5.5 | 5 | - | 1.2 | Yes | Yes |
APW7137 | SOT-23-5 | Boost | CM | 2.5 | 6 | 2.5 | 32 | 1 | - | 1000 | Yes | No |
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