MAX77839AEWL+T - 5.5V 6µA IQ Buck-Boost | Analog Devices
MPN: MAX77839AEWL+T ✓ AktifMAX77839AEWL+T Ringkasan
A buck-boost converter belongs to the switching-regulator hierarchy: unlike a linear regulator, it can regulate the output above or below its input. The MAX77839 therefore supports a stable rail when a battery voltage crosses the required output level. Its compact package and low quiescent current are particularly useful in wearable, mobile, and other battery-powered equipment.
Key verified features include 4.4A/3.6A switching-current ratings, a single-resistor adjustable output from 2.3V to 5.3V, and a configurable GPIO pin that can select forced-PWM control input or power-good open-drain output. Maxim's buck-boost controller technology provides high efficiency and seamless transition between buck and boost operation.
The topology dynamically regulates in either direction as the battery changes state. This differs from a buck-only converter, which cannot maintain an output above the input, and a boost-only converter, which cannot reduce an excessive input voltage. The available switching-current ratings also require careful inductor, capacitor, thermal, and PCB validation for the selected output voltage and load.
Typical applications include low-power wearables, smartphone accessories, one-cell portable equipment, Bluetooth-connected devices, and compact embedded systems. The MAX77839 evaluation kit can support hardware evaluation, with different MAX77839 variants selected according to whether POK functionality is required.
Designers should verify the complete WLP land pattern and pin assignments against the manufacturer datasheet before layout. Inductor selection, compensation, capacitor sizing, current rating, and layout must be derived for the required load because the supplied verified data does not provide values for those implementation details.
This page consolidates the verified manufacturer and distributor information, separates documented performance from missing engineering data, and records why no unverified drop-in substitute is recommended. That evidence-first approach helps engineers evaluate the MAX77839 without treating generic regulators as pin-compatible replacements.
Pilihan pengganti yang segera untuk MAX77839AEWL+T — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Tiada pilihan pengganti yang segera untuk produk ini.
Minta AlternatifMAX77839AEWL+T Penilaian maksimum & Ciri-ciri Elektrik
| Product Type | Buck-Boost Converter |
| Gambaran Tegangan Masukan | 1.8 V to 5.5 V |
| Adjustable Output Voltage Range | 2.3 V to 5.3 V |
| Arus Dalam Tentera | 6 µA |
| Buck Switching Current | 4.4 A |
| Boost Switching Current | 3.6 A |
| Output Count | 1 output |
| Konfigurasi Output | Adjustable |
| Output Setting Method | Single resistor |
| Minimum Battery Discharge Voltage | 1.8 V |
| GPIO Configuration | FPWM mode control input or POK open-drain output |
| Control Modes | FPWM or POK configuration |
| Output Kuasa | Open-drain, configuration-dependent |
| Transition Behavior | Seamless transition between buck and boost modes |
| Kemasan | 15-WLP, 2.07 mm × 1.51 mm |
| Jenis Pemasangan | Surface Mount |
| Target Battery Chemistries | One-cell Li-ion and batteries discharging to 1.8 V |
Panduan Konfigurasi Pin MAX77839AEWL+T 15-wlp, 2.07 mm × 1.51 mm
Konfigurasi pin untuk MAX77839AEWL+T (15-wlp, 2.07 mm × 1.51 mm pakai). Peranti kuasa ini mempunyai terminal kawat, buang, dan sumber. Untuk pakai non-polarized, rujuk dokumen pengeluar untuk orientasi pin 1 tepat dan perincian kebentuk.
Tiada data garisan pin yang diperoleh untuk MAX77839AEWL+T.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
MAX77839AEWL+T patut untuk 6 aplikasis: One-Cell Li-Ion Wearable, Smartphone and Mobile Accessory, Bluetooth Wearable Sensor, Battery-Powered IoT Node, Portable Medical Sensor, Compact Embedded Control Module.
One-Cell Li-Ion Wearable
The MAX77839AEWL+T fits wearables that require a stable rail as a one-cell Li-ion battery crosses the desired output voltage. Its 1.8V to 5.5V input range and 2.3V to 5.3V adjustable output allow buck operation when the cell is above the target and boost operation when it falls below. The 6µA quiescent current is valuable during low-load intervals, while seamless mode transition helps avoid rail disruption. Actual battery life must be calculated from efficiency at the intended load because the verified data does not provide a complete efficiency curve.
Disebarkan
Smartphone and Mobile Accessory
The MAX77839AEWL+T is appropriate for compact mobile accessories that need a regulated rail from a variable battery or USB source. Its input range extends from 1.8V to 5.5V, and the single-resistor output setting simplifies adjustment to a 2.3V to 5.3V target. Buck-boost operation keeps the load rail controlled whether the source is below, near, or above the output. Its 2.07mm by 1.51mm 15-WLP footprint supports space-constrained layouts, but exposed-pad assembly and land-pattern details require direct datasheet review.
Disebarkan
Bluetooth Wearable Sensor
The MAX77839AEWL+T can supply a wearable sensor when its battery must operate across the regulator's buck and boost regions. A 6µA quiescent current helps limit standing consumption during sensor idle periods, while the adjustable 2.3V to 5.3V output supports multiple radio or sensor-rail requirements. The configurable GPIO may provide forced-PWM control or a power-good open-drain indication according to the selected configuration. Timing, load transients, and POK behavior must be verified against the exact ordering suffix and system power-sequencing requirements.
Disebarkan
Battery-Powered IoT Node
The MAX77839AEWL+T suits a compact IoT node whose battery voltage can move below and above the required load rail. A regulated 2.3V to 5.3V output helps stabilize the downstream sensor, radio, or embedded controller while the 1.8V to 5.5V input range covers a one-cell discharge envelope. Low quiescent current is important for duty-cycled nodes with long idle periods. The design must still verify startup behavior, peak-load response, efficiency, and inductor saturation against the required load and battery impedance.
Disebarkan
Portable Medical Sensor
The MAX77839AEWL+T may serve as a compact power converter in a portable medical sensor when its operating range matches a one-cell battery system. Maintaining a 2.3V to 5.3V output across a 1.8V to 5.5V input can reduce rail variation as the cell discharges. However, medical use requires system-level validation of electrical safety, reliability, electromagnetic behavior, and risk controls; no medical certification is stated in the verified data. Designers must also qualify the assembled 15-WLP and confirm load transients before production use.
Disebarkan
Compact Embedded Control Module
The MAX77839AEWL+T fits embedded modules that need one adjustable rail despite variable battery conditions. The single-resistor 2.3V to 5.3V output setting reduces configuration complexity, and seamless buck-boost transition supports stable operation across a broad 1.8V to 5.5V source range. Designers should place input and output decoupling according to the manufacturer layout guidance and validate switching-node exposure to sensitive signals. The package is only 2.07mm by 1.51mm, so assembly capability and exposed-pad soldering should be confirmed before committing the layout.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk MAX77839AEWL+T — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini |
|---|---|
| Package | 15-WLP, 2.07 mm × 1.51 mm |
| Brand | Analog Devices |
| Product Type | Buck-Boost Converter |
| Input Voltage Range | 1.8 V to 5.5 V |
| Adjustable Output Voltage Range | 2.3 V to 5.3 V |
| Quiescent Current | 6 µA |
| Buck Switching Current | 4.4 A |
| Boost Switching Current | 3.6 A |
| Output Count | 1 output |
| Output Setting | Single-resistor adjustable |
| GPIO Function | FPWM control input or POK open-drain output |
Penyeberangsung Jelas
- Stable regulation on both sides of the output voltage (vsGeneric buck-only regulator)
- Low specified standby consumption (vsConventional higher-IQ buck-boost converter)
- Single-resistor output adjustment (vsFixed-output regulator)
- Configurable control or status function (vsFixed-function GPIO regulator)
Catatan Desain
Treat the 15-WLP land pattern and exposed-pad connection as controlled assembly features. The verified package dimensions are 2.07mm by 1.51mm, but the supplied excerpts do not provide the complete pin table, solder-mask layout, or exposed-pad recommendation. Before releasing copper or a solder mask, download the official MAX77839 datasheet and copy its footprint and assembly drawings exactly.
Keep the regulator's input loop, switching node, inductor connection, and output decoupling physically compact according to the manufacturer layout guidance. Do not route sensitive signals beneath or immediately beside the high-current switching path. The supplied data confirms buck-boost operation but does not specify switching frequency, so trace-current and EMI calculations require values from the datasheet and the selected inductor and capacitors.
Do not treat the 4.4A buck or 3.6A boost switching-current figures as guaranteed continuous output ratings. Select the inductor, switches, capacitors, and copper paths using verified efficiency curves, ripple limits, saturation margin, thermal limits, and the actual output-to-input ratio. Also include battery source impedance and startup current when checking whether the power source can support peak transitions.
Confirm the exact function of the configurable GPIO for the ordered MAX77839 variant before connecting it. The pin may be used as an FPWM control input or as a power-good open-drain output, so treating both uses simultaneously can cause sequencing errors. The verified evaluation-kit text names MAX77839BEWL+T and MAX77839DEWL+T for POK evaluation, but it does not establish either as a drop-in replacement for MAX77839AEWL+T.
Maklumat Kesediaan
The verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred.
