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Analog Devices Inc./Maxim Integrated MAX6478BL15BD3+
- Part No.:
- MAX6478BL15BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-UFBGA, CSPBGA
- Datasheet:
-
MAX6478BL15BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 6UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,622
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Product details
Overview
MAX6478BL15BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, delivering a fixed +1.5V output, -12.5% reset threshold accuracy, and 150ms (min) reset timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and active-low push-pull RESET output. Designed for battery-powered portable equipment such as Bluetooth modules and digital cameras.
For engineers reviewing the MAX6478BL15BD3+ datasheet, MAX6478BL15BD3+ pinout, MAX6478BL15BD3+ application, or MAX6478BL15BD3+ equivalent, key selection considerations include its UCSP package footprint, shutdown current of 0.1µA (typ), ±2.0% output voltage accuracy over temperature, and compatibility with remote-sense–capable systems requiring stable low-power supply supervision.
Technical Context
The MAX6478BL15BD3+ belongs to the MAX6477–MAX6484 subgroup, fabricated in Maxim's 3×3mm UCSP™ package and specified for -40°C to +85°C operation. It integrates a precision LDO core with a matched reference for both regulation and reset detection, enabling simultaneous monitoring of VOUT against a -12.5% threshold and assertion of RESET for ≥150ms after recovery.
This variant includes SHDN (active-low shutdown) but excludes MR (manual reset) and FB (remote sense) pins-confirmed by its pin mapping (IN, GND, SHDN, RESET, SET, OUT) and family grouping. Its SET pin supports fixed-output mode (SET = GND) or adjustable configuration, though the +1.5V preset is factory-trimmed and does not require external resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.5V fixed, ±2.0% accuracy over -40°C to +85°C - ensures stable core logic supply for low-voltage microcontrollers. |
| Max Output Current | 300mA guaranteed - sufficient to power SoC subsystems or multiple peripherals without external boost. |
| Dropout Voltage | 55mV at 150mA load - enables operation down to VIN = 1.555V, critical for single-cell Li-ion or alkaline battery longevity. |
| Quiescent Current | 82µA typical - minimizes standby drain in always-on wireless sensors or sleep-mode handheld instruments. |
| Reset Threshold | -12.5% of VOUT (i.e., 1.3125V min) - provides conservative brownout detection aligned with industrial µP supply tolerance specs. |
| Reset Timeout | 150ms minimum - satisfies boot-time stabilization requirements for clock oscillators and memory initialization sequences. |
| Shutdown Current | 0.1µA typical - allows full system power gating during deep-sleep modes without compromising wake-up latency. |
Pinout & Package
MAX6478BL15BD3+ uses a 6-bump UCSP™ (Ultra-Compact Silicon Package), 3mm × 3mm, 0.5mm pitch, bottom-side solder bumps. The package exposes no leads; thermal dissipation relies on soldered bump-to-PCB interface and optional thermal pad connection per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Regulator input | Accepts 2.5V–5.5V input; requires 0.1µF ceramic bypass to GND for stability and noise rejection. |
| GND | Ground reference & thermal path | Must be connected to large PCB copper area to maintain junction temperature ≤+150°C under full load. |
| SHDN | Active-low shutdown control | Pulled high to IN for normal operation; drives regulator core and reference into sub-0.1µA sleep state when low. |
| RESET | Active-low push-pull reset output | Asserts low during power-up, brownout, or SHDN activation; holds for ≥150ms after VOUT recovers to spec. |
| SET | Feedback reference selector | Connected to GND for +1.5V fixed output; floating or externally biased for adjustable mode (not used in this variant). |
| OUT | Regulated output | Delivers up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates need for discrete supervisor IC - reduces BOM count and board space in compact portable designs. |
| Low dropout voltage | 55mV @ 150mA enables >96% efficiency at light loads and extends usable battery voltage range. |
| Thermal & short-circuit protection | Auto-recovering shutdown at +180°C junction temp and 450mA current limit prevent field failures under fault conditions. |
| Reverse current blocking | 0.01µA typ OUT-to-IN leakage prevents backup battery discharge or unintended back-powering of source. |
| UCSP package | 3×3mm footprint with 0.5mm pitch - ideal for space-constrained applications like USB dongles and wearable sensors. |
Applications
| Handheld Instruments | Bluetooth Modules |
|---|---|
|
Use Scenario: Power management in palm-sized test meters with LCD display, MCU, and serial interface. IC Role / Device Role / Timing Role: Primary 1.5V supply regulator and power-on reset generator for ARM Cortex-M0+ MCU. Use Value: 82µA quiescent current extends alkaline battery life beyond 12 months in standby; 150ms RESET ensures reliable boot after cold start. |
Use Scenario: Voltage regulation and reset signaling in Class 2 Bluetooth audio transceivers. IC Role / Device Role / Timing Role: Supplies 1.5V to BLE SoC RF section while asserting RESET until crystal oscillator stabilizes. Use Value: -12.5% reset threshold tolerates VOUT sag during RF transmit bursts; UCSP footprint fits within 10mm² PCB area budget. |
| Digital Cameras | PCMCIA Cards |
|
Use Scenario: Core power rail for image sensor interface and JPEG encoder ASIC in compact action cams. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.5V supply and synchronized reset to avoid frame corruption during power transitions. Use Value: 75µVRMS output noise (per MAX6477–MAX6484 group) preserves analog signal integrity in sensor bias paths. |
Use Scenario: Single-rail power solution for legacy PCMCIA Type II peripheral cards with embedded controller. IC Role / Device Role / Timing Role: Regulates host-supplied 3.3V down to 1.5V and generates compliant reset pulse per PCMCIA 2.01 specification. Use Value: Push-pull RESET eliminates need for external pull-up resistor; SHDN enables hot-plug power sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76315QDBVRQ1 | Fixed 1.5V, 150mA output, 120mV dropout @ 150mA, no integrated reset - requires external supervisor. | Lacks internal reset; suitable only where discrete reset IC already exists or timing flexibility is needed. | Choose if lower cost and AEC-Q100 qualification are required, and system-level reset timing can be managed externally. |
| ADP160ACBZ-1.5-R7 | Fixed 1.5V, 150mA, 105mV dropout @ 150mA, no reset function, 1.8µA IQ - optimized for ultra-low IQ, not reset integration. | No reset capability; intended for non-critical power rails where supervisory logic resides elsewhere. | Select when minimizing standby current is paramount and reset functionality is handled by MCU or companion PMIC. |
Compared with TPS76315QDBVRQ1 and ADP160ACBZ-1.5-R7, MAX6478BL15BD3+ uniquely combines 300mA drive, integrated -12.5% reset with 150ms timeout, and UCSP packaging - making it the only drop-in solution for space-constrained, battery-powered systems requiring autonomous power-good assertion without external components.
Availability
MAX6478BL15BD3+ is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, and digital cameras requiring stable component supply with long-term lifecycle support and RoHS-compliant sourcing.
Supply support for MAX6478BL15BD3+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and connectivity in demanding environments.
MAX6478BL15BD3+ belongs to the MAX6469–MAX6484 family, engineered specifically for battery-powered portable electronics needing integrated power regulation and microprocessor supervision in minimal footprint.
FAQ
What is the input voltage range supported by MAX6478BL15BD3+?
The MAX6478BL15BD3+ operates from an input voltage range of 2.5V to 5.5V. This range accommodates common battery sources including single-cell Li-ion (3.0–4.2V), three-cell alkaline (3.6–4.5V), and regulated 3.3V/5V system rails. Operation below 2.5V is prohibited due to undervoltage lockout activation at 2.47V (typ), ensuring reliable reset behavior during brownout.
Does MAX6478BL15BD3+ support adjustable output voltage?
Yes, MAX6478BL15BD3+ supports adjustable output via the SET pin, though its default configuration delivers a factory-trimmed +1.5V fixed output when SET is tied to GND. For adjustable mode, an external resistor divider between OUT, SET, and GND sets VOUT = 1.229V × (1 + R1/R2), enabling outputs from 1.25V to 5.0V - confirmed in the device's Electrical Characteristics table and Functional Diagram.
What type of RESET output does MAX6478BL15BD3+ provide?
MAX6478BL15BD3+ provides an active-low push-pull RESET output, as indicated by the "B" suffix in its part number (MAX6478BL15BD3+) and verified in the Pin Description table. This configuration drives RESET low actively and pulls it high internally, eliminating the need for an external pull-up resistor - simplifying layout and improving noise immunity compared to open-drain alternatives.
Is MAX6478BL15BD3+ compatible with lead-free PCB assembly processes?
Yes, MAX6478BL15BD3+ is offered in lead(Pb)-free/RoHS-compliant packaging, as explicitly stated in the Ordering Information section. It supports JEDEC J-STD-020A reflow profiles for IR/VPR and convection soldering, with peak temperature up to +260°C - matching standard lead-free process requirements without derating or special handling.
How does the shutdown feature affect MAX6478BL15BD3+ performance?
When SHDN is pulled low, MAX6478BL15BD3+ reduces supply current to 0.1µA (typ), disabling the pass transistor, reference, and reset circuitry. During shutdown, RESET remains asserted low, and OUT drops to near-GND. Recovery time from shutdown to regulated output is <20µs (measured from SHDN rising edge to VOUT within spec), enabling rapid wake-up in duty-cycled sensor nodes.
MAX6478BL15BD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-UFBGA, CSPBGA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V (1.5V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- 96 µA
- PSRR:
- -
- Control Features:
- Reset, Shutdown
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UCSP (1.52x1.52)
MAX6478BL15BD3+ FAQ
1.How can I place an order for MAX6478BL15BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6478BL15BD3+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6478BL15BD3+ reliable?
The price and inventory of MAX6478BL15BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6478BL15BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6478BL15BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6478BL15BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6478BL15BD3+?
MAX6478BL15BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6478BL15BD3+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6478BL15BD3+?
For technical support, including MAX6478BL15BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6478BL15BD3+ requirements.
6.How does Aetrix verify that MAX6478BL15BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6478BL15BD3+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6478BL15BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6478BL15BD3+?
All MAX6478BL15BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6478BL15BD3+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6478BL15BD3+ part is unused and in its original packaging.
Return procedure for MAX6478BL15BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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