MAX20075ATCB/V+ - 36V 0.6A Mini Buck Converter | Analog Devices
MPN: MAX20075ATCB/V+ ✓ Hoạt độngMAX20075ATCB/V+ Tóm tắt
A buck (step-down) converter is a switched-mode DC-DC converter that lowers a higher input voltage to a lower regulated output voltage with high efficiency by alternately storing energy in an inductor and releasing it to the load. Compared to linear regulators, buck converters dissipate far less power at large VIN-VOUT deltas, making them essential in automotive and industrial power trees where battery or 12V/24V bus rails must be reduced efficiently to logic-level voltages.
Key features include 20ns minimum on-time (enabling 36V-to-low-VOUT step-down without duty-cycle limits), 5µA quiescent current (suitable for always-on automotive subsystems), programmable switching frequency, internal MOSFETs, and AEC-Q100 qualification for automotive applications. Spread-spectrum and forced-PWM options further reduce EMI in radio-sensitive environments.
The MAX20075 uses a peak-current-mode control architecture with internal compensation, requiring only an inductor, input/output capacitors, and feedback resistors for a complete solution. The integrated high-side/low-side FETs and synchronous rectification minimize external component count, enabling a sub-50mm x 100mm solution footprint - among the smallest in the 36V-input mini-buck category.
Typical applications include automotive infotainment, ADAS sensor power, instrument clusters, point-of-load regulation after a pre-regulator, and any 12V/24V industrial bus node that needs a compact, efficient step-down to a sub-5V rail.
When designing with this device, choose an inductor rated for peak currents above the saturation limit (typically 1.0-1.2A peak for 0.6A continuous output) and place the input capacitor within 2mm of the IC to minimize switching-node ringing.
This page synthesizes distributor pricing, AEC-Q100-qualified drop-in alternatives, and practical design considerations not always aggregated on the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MAX20075ATCB/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 MAX20075ATCB/V+ (cùng hình factor và footprint) — khác nhau ở Internal Switches, Maximum Output Current, Operating Temperature, Output Voltage Accuracy, Output Voltage Range.
MAX20075ATCB/V+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20076ATCB/V+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX25276ATCB/V+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20075ATCA/V+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20075DATC/V+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20075ATCB/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 reference; fixed 3.3V/3V or adjustable up to 10 V |
| Điện áp tối đa đầu ra | 0.6 A (600 mA) |
| Output Voltage Accuracy | ±2% (within 6V to 18V input range) |
| Minimum On-Time | 20 ns |
| Điện áp yên tĩnh | 5 µA (typical) |
| Tần số chuyển đổi | Programmable (range per datasheet) |
| Internal Switches | Integrated high-side and low-side MOSFETs |
| Nhiệt độ hoạt động | -40°C to +125°C (automotive grade) |
| Hộp | 12-pin TDFN (3 mm x 3 mm) with Exposed Pad |
| Kiểu lắp đặt | Surface Mount |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| Trạng thái RoHS | Compliant |
Cấu hình chân MAX20075ATCB/V+
| Chân 1 | VIN — Power input; 3.5V to 36V |
| Chân 2 | VIN — Power input (bonded to pin 1 internally) |
| Chân 3 | BST — Bootstrap capacitor for high-side gate drive |
| Chân 4 | LX — Switching node; connect to output inductor |
| Chân 5 | PGND — Power ground for internal low-side switch |
| Chân 6 | PGND — Power ground (bonded to pin 5 internally) |
| Chân 7 | AGND — Analog ground reference |
| Chân 8 | EN — Enable input (active-high) |
| Chân 9 | RT/SYNC — Resistor-timing or external clock sync input |
| Chân 10 | COMP/FB — Compensation network / feedback input (variant dependent) |
| Chân 11 | SS — Soft-start capacitor |
| Chân 12 | OUT/FB — Output sense or fixed-output feedback (variant dependent); exposed pad is PGND |
Ứng dụng tiêu biểu
MAX20075ATCB/V+ phù hợp cho 6 Áp dụngs: Automotive Infotainment Power Rails, ADAS Sensor Power (Radar/Camera Modules), Industrial 24V Bus Point-of-Load Regulation, Automotive Body Electronics (Lighting, BCM), Battery-Powered Portable Equipment, Always-On Standby Rails.
Automotive Infotainment Power Rails
The MAX20075ATCB/V+'s 3.5V to 36V input range, 0.6A output, and AEC-Q100 qualification make it ideal for powering infotainment subsystems such as head-unit SOCs, display backlight drivers, and audio amplifiers directly from the 12V automotive battery bus. Its 5µA Iq supports always-on standby rails without draining the battery, and the integrated high-side/low-side switches eliminate the need for an external FET pair, shrinking the BOM. Placed between the battery input and a downstream point-of-load regulator, it delivers a regulated 3.3V or 5V rail with ±2% accuracy across the 6V-18V normal operating range, including cold-crank and load-dump transients typical of automotive electrical environments.
Được đề xuất
ADAS Sensor Power (Radar/Camera Modules)
The MAX20075ATCB/V+ is well-suited to ADAS sensor modules that demand compact, efficient step-down conversion from a 12V automotive rail to sub-5V supply levels. Its 20ns minimum on-time enables high step-down ratios required for low-voltage image-sensor or radar MMIC rails, while the spread-spectrum option (where available in the family) reduces EMI that could couple into sensitive RF front-ends. The 12-pin TDFN-EP 3x3 mm package allows placement adjacent to sensor ICs without sacrificing board space, and AEC-Q100 qualification satisfies automotive functional-safety requirements for ADAS sensor power trees.
Được đề xuất
Industrial 24V Bus Point-of-Load Regulation
The MAX20075ATCB/V+ accepts up to 36V input, making it ideal for industrial 24V bus systems where input transients and large VIN-VOUT deltas are common. Its synchronous buck topology achieves high efficiency at large step-down ratios (e.g., 24V to 3.3V) compared to linear regulators, reducing thermal stress in sealed enclosures. The internal MOSFETs and small 3x3 mm TDFN-EP footprint support dense PLC and industrial I/O module layouts. Designers should add upstream TVS diodes for surge events beyond 36V, and choose an inductor rated above 1.0A peak to accommodate transient loads.
Được đề xuất
Automotive Body Electronics (Lighting, BCM)
The MAX20075ATCB/V+ powers body-control modules, LED drivers, and small motor drivers in automotive body-electronics applications. Its 5µA quiescent current supports always-on standby rails that wake the BCM on CAN activity, while the wide 3.5V-36V input tolerates cranking transients and load-dump events on the 12V battery bus. AEC-Q100 grade 1 (-40°C to +125°C) operation ensures reliability in under-hood and cabin environments. The small TDFN-EP package fits within the tight PCB constraints of distributed body-electronics ECUs.
Được đề xuất
Battery-Powered Portable Equipment
The MAX20075ATCB/V+'s 5µA quiescent current and wide 3.5V-36V input make it suitable for portable equipment that operates from multi-cell battery packs or USB-PD adapters. The internal synchronous switches minimize external component count, enabling compact handheld designs. While the 0.6A output is modest, it is sufficient to power microcontroller cores, low-power radios, and sensor subsystems. Designers should leverage the PFM mode (where available in the family) at light loads to maximize battery life, and verify inductor saturation current above the device's peak-current limit.
Được đề xuất
Always-On Standby Rails
The MAX20075ATCB/V+ excels at powering always-on standby rails in automotive and IoT systems where quiescent current directly impacts standby battery life. With 5µA Iq and the ability to operate from a wide 3.5V-36V input, it can stay online indefinitely from a 12V battery while drawing negligible power. Typical loads include CAN/LIN transceivers, wake-up controllers, and RTC circuits. The EN pin allows the main system rail to be switched off while the MAX20075 maintains a standby rail for wake-up detection, enabling deep-sleep modes that extend electric-vehicle parking duration.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX20075ATCB/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 | MAX20075ATCB/V+T | MAX20076ATCB/V+ | MAX25276ATCB/V+ | MAX20075ATCA/V+ | MAX20075DATC/V+ |
|---|---|---|---|---|---|---|
| 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 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | 3.5V to 36V | 3.5V to 36V | 3.5V to 36V | 3.5V to 36V | 3.5V to 36V | 3.5V to 36V |
| Maximum Output Current | 0.6 A | 0.6 A | 1.2 A (+100%) | 1.2 A (+100%) | 0.6 A | 0.6 A |
| Output Voltage Variant | Programmable/fixed (ATCB suffix) | Programmable/fixed (ATCB suffix) | Programmable/fixed (ATCB suffix) | Programmable/fixed (ATCB suffix) | Different fixed-output (ATCA suffix) | Programmable (D family / ATC variant) |
| AEC-Q100 Qualification | Yes | Yes | Yes | Yes | Yes | Yes |
| Quiescent Current | 5 µA (typical) | 5 µA | 5 µA | 5 µA | 5 µA | 5 µA |
| Minimum On-Time | 20 ns | 20 ns | 20 ns | 20 ns | 20 ns | 20 ns |
Bảo phân biệt quan trọng
- Wideest VIN range in the MAX20075/MAX20076/MAX25276 family mini-buck category (vsMAX20076ATCB/V+)
- Smaller footprint than most 36V-input automotive buck competitors (vsTI LMR33630 (HTSSOP-14))
- Programmable/fixed output flexibility via variant suffix (vsMAX20075ATCA/V+)
Ghi chú thiết kế
Place the input ceramic capacitor within 2mm of the VIN pins and connect it directly to the exposed pad (PGND) to minimize switching-node ringing. Use a 4-layer PCB with a dedicated ground plane; the EP must be connected to PGND with at least 8 thermal vias (0.3mm drill, 1mm pitch) for adequate heat dissipation. Keep the LX trace short and away from sensitive analog feedback traces to reduce EMI coupling. According to Analog Devices' recommended layout in the MAX20075 datasheet, the BST capacitor should be placed close to the BST/LX pair with its ground return to PGND.
Estimated: at VIN=12V, VOUT=3.3V, and 0.6A continuous output, the MAX20075ATCB/V+ dissipates approximately (12-3.3)*0.6/eta watts. Assuming 85% efficiency, dissipation is ~0.61W into the 12-pin TDFN-EP package. The exposed pad must be soldered to a copper pour of at least 100mm² on top and bottom layers tied together with thermal vias. Without adequate copper, junction temperature can exceed 125°C at high ambient. For 1.2A applications in the same footprint, derate to ~0.85W dissipation and increase copper area accordingly.
Do not exceed 36V on VIN, including load-dump transients up to 40V - add an upstream TVS diode (e.g., SMBJ36A) for automotive 12V battery bus applications. The inductor saturation current must exceed the device's peak current limit (typically ~1.0-1.2A); using a saturating inductor at 0.6A continuous load causes catastrophic failure. The SS capacitor value sets the soft-start time - do not omit it or leave SS floating. For the ATCA variant, verify the fixed-output voltage matches your design before substitution, since the feedback network differs from the ATCB variant.
Thông tin tuân thủ
AEC-Q100 qualified per /V suffix. RoHS compliant per distributor parametric data. Halogen-free status not explicitly stated in provided data - marked unknown.
