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Analog Devices Inc./Maxim Integrated MAX8614BETD/V+
- Part No.:
- MAX8614BETD/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
MAX8614BETD/V+.pdf
- Description:
- IC REG CONV CCD 2OUT 14TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,852
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Product details
Overview
The MAX8614BETD/V+ from Maxim Integrated is a dual-output, fixed-frequency (1MHz) step-up/inverting DC-DC converter IC designed for CCD bias and OLED display power in portable imaging systems. It delivers up to +24V positive output (50mA) and −16V relative to VCC negative output (100mA) from a 2.7V–5.5V input, with True Shutdown™, pin-selectable sequencing, and integrated overload/thermal protection.
For engineers reviewing the MAX8614BETD/V+ datasheet, MAX8614BETD/V+ pinout, MAX8614BETD/V+ application, or MAX8614BETD/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed operating ranges, and real-world design implications for CCD imaging power rails - including current-limit differentiation vs. MAX8614A, fault-flag behavior, and automotive-grade AEC-Q100 qualification.
Technical Context
The MAX8614BETD/V+ integrates two independent PWM current-mode regulators sharing a 1MHz oscillator: one step-up controller driving LXP/PVP with 0.8A peak inductor current limit, and one inverting controller driving LXN with 0.75A peak limit. Both use internal slope compensation and error amplifiers referenced to 1.25V (REF) and 1.01V (FBP), enabling precise voltage positioning and fast transient response.
Its control architecture supports pin-selectable power-on sequencing (SEQ), independent enable logic (ONBST/ONINV), soft-start with controlled inrush (<500mA), and fault detection via open-drain FLT asserting low after 100ms overload. The device implements True Shutdown™ by disconnecting both outputs from VCC using internal PVP and LXN switches, achieving 0.1µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion and regulated 3.3V/5V rails without external pre-regulation. |
| Positive Output Range | Up to +24V - adjustable via FBP feedback divider; enables high-voltage CCD gate bias (e.g., +15V to +20V). |
| Negative Output Range | Up to −16V relative to VCC - adjustable via FBN/REF divider; supports −7.5V to −12.7V (at VCC=3.3V) for CCD substrate bias. |
| LXP Peak Current Limit | 0.8A (typ) - higher than MAX8614A's 0.44A, enabling 50mA at +15V with margin for load transients. |
| LXN Peak Current Limit | 0.75A (typ) - supports 100mA at −7.5V while maintaining stability under dynamic CCD load steps. |
| Switching Frequency | 1MHz (±7%) - enables compact 2.2µH–4.7µH inductors and reduces EMI filtering burden in noise-sensitive imaging paths. |
| Shutdown Current | 0.1µA at +25°C - minimizes battery drain during camera standby, critical for portable digital cameras and camcorders. |
Pinout & Package
MAX8614BETD/V+ uses a 3mm × 3mm, 14-pin TDFN package with exposed pad (EP) connected to GND. Pin numbering follows top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ONBST | Step-up enable input | Active-high logic control; ties to AVCC for automatic startup or driven externally for sequenced power delivery. |
| 2 FBN | Negative output feedback | Connects to resistor divider between VINV and REF (1.25V); sets negative output voltage with 0V threshold. |
| 3 AVCC | Bias supply | Must be tied directly to VCC; powers internal analog circuitry and reference; bypassed with 0.22µF ceramic to GND. |
| 4 REF | 1.25V precision reference | Stable internal reference used for FBN feedback and soft-start ramp; requires 0.22µF ceramic decoupling. |
| 5 GND | Analog ground | Low-noise return for REF, FBP, FBN; must be short-traced to PGND to minimize switching noise coupling. |
| 6 FLT | Fault flag output | Open-drain active-low signal asserting after 100ms overload or thermal shutdown; pulled up to AVCC via 100kΩ. |
| 7 FBP | Positive output feedback | Connects to resistor divider between VBST and GND; 1.01V threshold enables precise +15V/+20V regulation. |
| 8 SEQ | Sequencing select | Logic input determining startup order: low = independent ONBST/ONINV control; high = positive output first. |
| 9 ONINV | Inverter enable input | Active-high logic control; enables/disables inverter independently or synchronously with step-up converter. |
| 10 LXP | Step-up switch node | High-impedance in shutdown; connects to inductor and catch diode anode; handles 0.8A peak current. |
| 11 PGND | Power ground | High-current return for LXN/LXP switches; must be short-traced to GND to reduce ground bounce and EMI. |
| 12 PVP | True Shutdown load switch | Internal MOSFET disconnecting VCC from LXP in shutdown; eliminates battery drain path through external diode. |
| 13 VCC | Main power input | Supplies both converters; must be tied to AVCC; accepts 2.7V–5.5V with UVLO threshold at 2.55V (typ). |
| 14 LXN | Inverter switch node | High-impedance in shutdown; connects to inductor and catch diode cathode; handles 0.75A peak current. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulation | Simultaneous +24V and −16V (vs. VCC) outputs with separate feedback loops (FBP/FBN) and current limits. |
| True Shutdown™ | Zero-load current path from VCC to either output: PVP disconnects step-up side; LXN switch disables inverter. |
| Pin-selectable sequencing | SEQ pin configures startup order - critical for CCD imagers requiring specific bias voltage ramp timing. |
| 1MHz fixed-frequency PWM | Enables use of small 2.2µH–4.7µH inductors and reduces EMI filtering complexity in compact camera PCBs. |
| Overload/thermal protection | FLT asserts low after 100ms overload; thermal shutdown at +170°C (typ); auto-recovery after cooldown. |
| AEC-Q100 qualified | Automotive-grade reliability: rated for −40°C to +85°C operation with enhanced process controls and testing. |
Applications
| CCD Imaging Bias Supply | OLED Display Power |
|---|---|
|
Use Scenario: Powering vertical/horizontal transfer gates and substrate bias in digital camera CCD sensors. IC Role / Device Role / Timing Role: Generates tightly regulated +15V (gate drive) and −7.5V (substrate) with synchronized soft-start to prevent image artifacts. Use Value: Prevents charge smearing during power-up via SEQ-controlled sequencing and voltage positioning minimizes transient droop during pixel readout. |
Use Scenario: Supplying anode/cathode bias voltages for small-form-factor OLED displays in smartphones. IC Role / Device Role / Timing Role: Delivers +12V (anode) and −5V (cathode) from single 3.6V Li-ion cell with minimal board area. Use Value: 1MHz switching allows 2.2µH inductors and <10mm² total solution size; True Shutdown extends standby battery life. |
| Digital Camera Main Power | Portable Camcorder System |
|
Use Scenario: Consolidating dual-rail power for image sensor, lens actuator, and flash LED driver in compact digital cameras. IC Role / Device Role / Timing Role: Provides isolated positive/negative rails with independent enable (ONBST/ONINV) for subsystem-level power gating. Use Value: 0.1µA shutdown current and fault flag (FLT) simplify system-level power management and diagnostics. |
Use Scenario: Biasing CMOS image sensor and audio codec in handheld camcorders with extended runtime requirements. IC Role / Device Role / Timing Role: Delivers stable ±7.5V rails across temperature (−40°C to +85°C) with AEC-Q100 qualification for reliability. Use Value: Higher current limits (0.8A/0.75A) support burst-mode video capture loads without output collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8614AETD+ | Lower LXP/LXN current limits (0.44A/0.33A); same pinout, package, and feature set. | Suitable for lower-power CCDs (25mA/+15V, 50mA/−7.5V) where MAX8614BETD/V+'s headroom is unnecessary. | Select MAX8614AETD+ when load currents stay below 30mA positive / 60mA negative to reduce cost and thermal load. |
| TPS65131RGTR | Fixed +15V/−15V outputs; no adjustable feedback; 1.2MHz switching; 400mA/400mA capability. | Designed for TFT LCD bias; lacks SEQ, True Shutdown, and automotive qualification. | Choose TPS65131RGTR only for non-adjustable, non-automotive LCD applications where simplicity outweighs flexibility. |
Compared with MAX8614AETD+, the MAX8614BETD/V+ provides 82% higher step-up current capability and 127% higher inverter current, enabling robust operation under dynamic CCD loads; versus TPS65131RGTR, it offers programmable outputs, sequencing control, and AEC-Q100 compliance - essential for imaging systems requiring field reliability and design flexibility.
Availability
MAX8614BETD/V+ is available at Aetrix Electronics and suitable for digital cameras, camcorders, and portable medical imaging devices requiring stable component supply with automotive-grade reliability and dual-rail programmability.
Supply support for MAX8614BETD/V+ 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, mixed-signal, and power management ICs for demanding applications in automotive, industrial, and consumer electronics.
The MAX8614 series targets portable imaging systems, delivering integrated dual-rail DC-DC conversion with sequencing, protection, and automotive qualification - specifically engineered for CCD/OLED bias in space-constrained, battery-powered devices.
FAQ
What is the key functional difference between MAX8614BETD/V+ and MAX8614AETD+?
The MAX8614BETD/V+ features higher current limits: 0.8A peak on LXP (step-up) and 0.75A peak on LXN (inverter), versus 0.44A and 0.33A for MAX8614AETD+. This enables the MAX8614BETD/V+ to sustain 50mA at +15V and 100mA at −7.5V, making it suitable for higher-power CCD sensors where the MAX8614AETD+ would saturate. All other features - pinout, sequencing, True Shutdown™, and AEC-Q100 qualification - are identical.
Does MAX8614BETD/V+ support adjustable output voltages, and how is regulation achieved?
Yes, MAX8614BETD/V+ supports fully adjustable outputs: the positive rail (VBST) is set via a resistor divider from VBST to GND connected to FBP (1.01V threshold), and the negative rail (VINV) is set via a divider from VINV to REF (1.25V) connected to FBN (0V threshold). Regulation is maintained by independent current-mode PWM controllers with internal error amplifiers, enabling tight line/load regulation and voltage positioning for minimal transient droop.
What does the "/V+" suffix in MAX8614BETD/V+ signify, and why does it matter for design-in?
The "/V+" suffix indicates AEC-Q100 qualification and lead(Pb)-free/RoHS-compliant packaging. This means MAX8614BETD/V+ has undergone automotive-grade stress testing (including temperature cycling, HTOL, and ESD), is rated for −40°C to +85°C operation, and meets strict material content requirements. For industrial or medical portable devices requiring high reliability, this suffix validates long-term stability and supply chain continuity beyond commercial-grade alternatives.
How does True Shutdown™ work in MAX8614BETD/V+, and what benefit does it provide?
True Shutdown™ in MAX8614BETD/V+ actively breaks both DC current paths: the internal PVP switch disconnects VCC from LXP on the step-up side, and the LXN switch turns off on the inverter side. This eliminates battery drain through external diodes or loads during shutdown - reducing quiescent current to just 0.1µA. In contrast, conventional boost converters retain a diode-based path, causing continuous leakage that depletes batteries in always-on imaging devices.
Can MAX8614BETD/V+ be used without external components, and what are the minimum required parts?
No, MAX8614BETD/V+ requires external components for operation: two inductors (2.2µH–4.7µH), two Schottky catch diodes (e.g., MBR0530L), input bypass capacitor (≥22µF), REF bypass (0.22µF), and feedback resistors for FBP/FBN. Minimum required parts include LXP/LXN inductors, PVP-connected diode, REF capacitor, and FB dividers - omitting any causes failure to regulate or risk instability. Full BOM is detailed in the Typical Operating Circuit (Figure 1) of the datasheet.
MAX8614BETD/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Converter, CCD
- Voltage - Input:
- 2.7V ~ 5.5V
- Number of Outputs:
- 2
- Voltage - Output:
- Adj up to 24V, Adj down to -16V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TDFN (3x3)
MAX8614BETD/V+ FAQ
1.How can I place an order for MAX8614BETD/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8614BETD/V+ 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 MAX8614BETD/V+ reliable?
The price and inventory of MAX8614BETD/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8614BETD/V+ is usually 5 days.
3.What payment methods are accepted for MAX8614BETD/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8614BETD/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8614BETD/V+?
MAX8614BETD/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8614BETD/V+ 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 MAX8614BETD/V+?
For technical support, including MAX8614BETD/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8614BETD/V+ requirements.
6.How does Aetrix verify that MAX8614BETD/V+ is sourced from the original manufacturer or authorized distributors?
All MAX8614BETD/V+ 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 MAX8614BETD/V+ meets industry standards.
7.What is the process for return or replacement of MAX8614BETD/V+?
All MAX8614BETD/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8614BETD/V+, 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 MAX8614BETD/V+ part is unused and in its original packaging.
Return procedure for MAX8614BETD/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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