MAX20076ATCB/V+ - 36V 1.2A 2MHz Mini Buck Converter | ADI
MPN: MAX20076ATCB/V+ ✓ Hoạt độngMAX20076ATCB/V+ Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MAX20076ATCB/V+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX20076ATCB/V+ (cùng hình factor và footprint) — khác nhau ở Switching Frequency, Maximum Output Current, Package, Internal Switches, Operating Temperature.
MAX20075ATCA/V+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20076ATCA/V+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20076ATCB/V+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX25276ATCB/V+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20076ATCD/V+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20076ATCB/V+ Tỷ lệ tối đa & tính chất điện
| Cấu trúc | Synchronous Buck (Step-Down) |
| Phạm vi điện áp đầu vào | 3.5 V to 36 V |
| Khoảng điện áp đầu ra | 1 V to 10 V (programmable or factory-fixed) |
| Output Voltage Accuracy | ±2% (over 6 V to 18 V VIN) |
| Điện áp tối đa đầu ra | 1.2 A |
| Tần số chuyển đổi | 2.1 MHz (typ) |
| Minimum On-Time | 20 ns |
| Internal Switches | High-side + low-side synchronous FETs integrated |
| Hộp | 12-pin TDFN (3 mm x 3 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +125C (automotive grade) |
| Automotive Qualification | AEC-Q100 ("/V+" suffix) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| Spread-Spectrum Option | Available in MAX25276 family variant |
Cấu hình chân MAX20076ATCB/V+
| Chân 1 | EN — Enable input (active high) |
| Chân 2 | BST — Bootstrap supply for high-side gate driver |
| Chân 3 | LX — Inductor switching node (connected to internal HS/LS FETs) |
| Chân 4 | VIN — Input supply voltage (3.5V to 36V) |
| Chân 5 | PGND — Power ground for low-side FET |
| Chân 6 | AGND — Analog ground (connect to PGND) |
| Chân 7 | FB — Feedback input (external resistor divider for adjustable output) |
| Chân 8 | COMP — Compensation node (internal compensation for fixed-output variants) |
| Chân 9 | SS — Soft-start capacitor connection |
| Chân 10 | VCC — Internal 5V LDO output (bypass with 1uF cap) |
| Chân 11 | OUT — Output voltage sense (also powers internal circuitry) |
| Chân 12 | PGOOD — Power-good open-drain output |
Ứng dụng tiêu biểu
MAX20076ATCB/V+ phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX20076ATCB/V+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Higher output current rating within the same TDFN-12 footprint (vsMAX20075ATCA/V+)
- Synchronous rectification eliminates external Schottky diode (vsMAX20075ATCA/V+)
- Fixed factory trim options eliminate external feedback resistors (vsMAX20076ATCA/V+)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
