MAX20076ATCB/V+ - 36V 1.2A 2MHz Mini Buck Converter | ADI
部品番号: MAX20076ATCB/V+ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.15 | $315.00 |
| 500 | $2.72 | $1,360.00 |
| 1,000 | $2.34 | $2,340.00 |
| 2,500 | $2.05 | $5,125.00 |
MAX20076ATCB/V+ 概要
A buck converter (step-down switching regulator) is a power management IC that uses an inductor, capacitor, and switching transistors to convert a higher DC input voltage into a lower DC output voltage with high efficiency. Synchronous bucks integrate a low-side FET to replace the external Schottky diode, reducing conduction loss. Mini-buck parts target compact, thermally-constrained boards by minimizing external component count and PCB area, fitting the role of "high-voltage point-of-load regulator" within the broader power management IC hierarchy.
Key differentiating features of the MAX20076ATCB/V+ include 3.5V to 36V wide input tolerance for load-dump survival, 1.2A continuous output current, 2.1MHz fixed switching frequency (above the AM band for EMI-sensitive automotive designs), factory-trimmed or resistor-set output options, and AEC-Q100 qualification under the "/V+" suffix. The exposed thermal pad and TDFN-12 footprint keep junction-to-ambient thermal resistance low enough for 1.2A delivery in automotive temperature ranges.
Architecturally, the device uses peak-current-mode control with internal compensation, a high-side and low-side N-channel MOSFET pair, and a precision feedback chain. Spread-spectrum variants exist in the same family for EMI mitigation. Compared to linear regulators, this synchronous buck offers substantially higher efficiency at large VIN/VOUT deltas, allowing smaller thermal solutions in space-constrained modules.
Typical applications include automotive infotainment and cluster power rails, ADAS camera and sensor modules, body electronics (body controllers, lighting), industrial 24V/28V bus point-of-load conversion, and any high-voltage automotive sub-system needing a small, qualified buck. The fixed-output factory variants further simplify design when no output-voltage adjustment is needed.
When designing with this part, choose a low-DCR shielded inductor sized for the 2.1MHz switching frequency and verify the input capacitor handles the worst-case RMS ripple. The exposed pad must be soldered to a sufficiently large copper pour to keep junction temperature within the automotive-grade range under full load.
This page synthesizes distributor pricing, drop-in same-family variants (MAX20075, MAX25276, fixed-output versions) and practical design notes not consolidated in the manufacturer datasheet, to help engineers select and source the right variant quickly.
ドロップイン代替品: MAX20076ATCB/V+ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MAX20076ATCB/V+ （同一形状・フットプリント） — 相違点: Switching Frequency, Maximum Output Current, Package, Internal Switches, Operating Temperature.
クイック比較ツール — 並列比較する代替部品を選択:
MAX20075ATCA/V+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX20076ATCA/V+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX20076ATCB/V+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX25276ATCB/V+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX20076ATCD/V+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX20076ATCB/V+ 最大定格＆電気的特性
| トポロジー | Synchronous Buck (Step-Down) |
| 入力電圧範囲 | 3.5 V to 36 V |
| 出力電圧範囲 | 1 V to 10 V (programmable or factory-fixed) |
| Output Voltage Accuracy | ±2% (over 6 V to 18 V VIN) |
| 最大出力電流 | 1.2 A |
| スイッチング周波数 | 2.1 MHz (typ) |
| Minimum On-Time | 20 ns |
| Internal Switches | High-side + low-side synchronous FETs integrated |
| パッケージ | 12-pin TDFN (3 mm x 3 mm) with exposed pad |
| 実装タイプ | Surface Mount |
| 動作温度 | -40C to +125C (automotive grade) |
| Automotive Qualification | AEC-Q100 ("/V+" suffix) |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
| Spread-Spectrum Option | Available in MAX25276 family variant |
MAX20076ATCB/V+ ピン構成
| ピン 1 | EN — Enable input (active high) |
| ピン 2 | BST — Bootstrap supply for high-side gate driver |
| ピン 3 | LX — Inductor switching node (connected to internal HS/LS FETs) |
| ピン 4 | VIN — Input supply voltage (3.5V to 36V) |
| ピン 5 | PGND — Power ground for low-side FET |
| ピン 6 | AGND — Analog ground (connect to PGND) |
| ピン 7 | FB — Feedback input (external resistor divider for adjustable output) |
| ピン 8 | COMP — Compensation node (internal compensation for fixed-output variants) |
| ピン 9 | SS — Soft-start capacitor connection |
| ピン 10 | VCC — Internal 5V LDO output (bypass with 1uF cap) |
| ピン 11 | OUT — Output voltage sense (also powers internal circuitry) |
| ピン 12 | PGOOD — Power-good open-drain output |
主な用途
MAX20076ATCB/V+ の用途: 6 件s: Automotive Infotainment Power Rails, ADAS Camera and Sensor Modules, Body Electronics and Lighting Controllers, Industrial 24V/28V Bus Point-of-Load Conversion, Automotive Instrument Cluster Power, eCall and Telematics Power Supply.
Automotive Infotainment Power Rails
The MAX20076ATCB/V+'s 3.5V to 36V input range and 1.2A output make it ideal for powering infotainment head-unit subsystems from an automotive 12V bus. With ±2% accuracy across the 6V to 18V nominal automotive input range, it cleanly supplies core logic rails, audio codec AVDD, and display backlight drivers without drift during cranking or load-dump events. The 2.1MHz switching frequency sits above the AM broadcast band, eliminating audible interference with radio receivers.
おすすめ
ADAS Camera and Sensor Modules
The MAX20076ATCB/V+'s compact 12-pin TDFN-EP footprint and 1.2A output current are well suited for the small PCB area inside ADAS camera housings and radar sensor modules. Its 20ns minimum on-time supports large step-down ratios at 2.1MHz, enabling a tiny 1µH inductor to fit behind the sensor lens assembly. AEC-Q100 qualification ensures operation across -40C to +125C automotive temperature ranges required for windshield-mounted or bumper-integrated sensor modules.
おすすめ
Body Electronics and Lighting Controllers
Body control modules (BCMs) and LED driver front-ends operate directly from the 12V automotive battery and must tolerate 36V load-dump transients. The MAX20076ATCB/V+ accepts this wide input natively, regulating 3.3V or 5V rails at up to 1.2A for microcontroller and CAN transceiver supply. Its high efficiency at large VIN/VOUT deltas minimizes thermal rise inside sealed BCM enclosures, where ambient temperatures can exceed +85C under hood-line mounting.
おすすめ
Industrial 24V/28V Bus Point-of-Load Conversion
Industrial PLCs, factory-automation I/O cards, and process-control subsystems commonly use 24V nominal bus rails with transient excursions to 36V. The MAX20076ATCB/V+ accepts this directly, stepping down to 3.3V or 5V at 1.2A to power isolated digital isolators, RS-485 transceivers, and analog front-ends. The 2.1MHz switching frequency enables small inductors fitting on densely populated backplane cards, and the exposed thermal pad sustains continuous 1.2A load in factory-floor ambient conditions.
おすすめ
Automotive Instrument Cluster Power
Digital instrument clusters require clean, low-noise rails for TFT display timing controllers and graphics processors. The MAX20076ATCB/V+ delivers ±2% accurate output with 2.1MHz switching that avoids interference with the cluster's AM/FM tuner or DAB receiver. Up to 1.2A supports the cluster MCU plus backlight boost-converter front-end simultaneously, all from the same TDFN-EP footprint that fits behind the cluster's narrow mechanical housing.
おすすめ
eCall and Telematics Power Supply
Emergency-call (eCall) modules and telematics control units (TCUs) remain powered even when the ignition is off, drawing from the 12V battery for weeks at a time. The MAX20076ATCB/V+'s high efficiency at 12V-to-3.3V conversion minimizes quiescent drain on the battery, while its 36V input tolerance protects against load-dump when the alternator re-engages. The AEC-Q100 automotive grade under the "/V+" suffix is required for homologation in most vehicle platforms.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX20076ATCB/V+ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MAX20075ATCA/V+ | MAX20076ATCA/V+ | MAX20076ATCB/V+T | MAX25276ATCB/V+ | MAX20076ATCD/V+ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 12-pin TDFN-EP (3x3 mm) | 12-pin TDFN-EP (3x3 mm) - same | 12-pin TDFN-EP (3x3 mm) - same | 12-pin TDFN-EP (3x3 mm) - same | 12-pin TDFN-EP (3x3 mm) - same | 12-pin TDFN-EP (3x3 mm) - same |
| Output Current | 1.2 A | 0.6 A | 1.2 A | 1.2 A | 1.2 A | 1.2 A |
| Input Voltage Range | 3.5 V to 36 V | 3.5 V to 36 V | 3.5 V to 36 V | 3.5 V to 36 V | 3.5 V to 36 V | 3.5 V to 36 V |
| Switching Frequency | 2.1 MHz (fixed) | 2.1 MHz | 2.1 MHz | 2.1 MHz | 2.1 MHz (spread-spectrum) | 2.1 MHz |
| Output Voltage Accuracy | ±2% (6V to 18V VIN) | ±2% | ±2% | ±2% | ±2% | ±2% |
| Factory Output Trim Code | TCB (specific fixed Vout) | TCA | TCA | TCB | TCB | TCD |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
主な差別化要因
- Higher output current rating within the same TDFN-12 footprint （vs MAX20075ATCA/V+)
- Synchronous rectification eliminates external Schottky diode （vs MAX20075ATCA/V+)
- Fixed factory trim options eliminate external feedback resistors （vs MAX20076ATCA/V+)
設計ノート
Estimated: at VIN=12V, VOUT=3.3V, IOUT=1.2A, efficiency ~85%, power dissipation = (12-3.3)*1.2/0.85 ≈ 12.3W less POUT = 1.2 * (1-0.85)/0.85*12 ≈ internal loss ~2.3W. The TDFN-12 exposed-pad thermal resistance must be verified against the PCB copper-pour area in your specific layout; minimum 1 sq-inch of 2oz copper on top layer is recommended. At full 1.2A continuous +125C operation, derate to ~0.8A if no thermal enhancement is used.
Place the input ceramic capacitor (4.7uF X7R minimum, 10uF recommended) directly across VIN and PGND pins within 2mm of the package. Route the LX node with a short, wide trace to the inductor to minimize switching node area and EMI. The bootstrap capacitor (0.1uF) must be placed close to BST and LX pins. Connect AGND and PGND at a single point under the IC exposed pad to avoid switching noise coupling into the analog feedback path.
Do not operate the MAX20076ATCB/V+ above 36V input, including transient excursions — automotive load-dump can reach 40V+ if not externally clamped. Verify the inductor saturation current rating exceeds the peak current limit (typically 1.8A peak for the MAX20076 family) under all operating conditions. Do not omit the soft-start capacitor; without it, inrush current can trigger false overcurrent protection during startup into large output capacitors.
At 2.1MHz switching frequency, the LX node is the primary EMI radiator. Use a shielded inductor and minimize the LX copper pour area. Place input and output capacitors to form tight high-frequency loops. If further EMI margin is required, consider the MAX25276ATCB/V+ which adds spread-spectrum frequency dithering to reduce peak EMI emissions by up to 10dB. The TDFN exposed pad also acts as a small EMI shield when properly grounded.
コンプライアンス情報
RoHS and REACH compliance per Analog Devices product page. AEC-Q100 qualified under the /V+ suffix per manufacturer datasheet. Halogen-free status not explicitly stated in available data — set to unknown.
