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Analog Devices Inc./Maxim Integrated MAX1577YETA+TG47
- Part No.:
- MAX1577YETA+TG47
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- -
- Datasheet:
-
MAX1577YETA+TG47.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
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Product details
Overview
MAX1577YETA+TG47 from Maxim Integrated is a white LED regulating charge pump IC designed for camera flash and movie light applications, delivering up to 1.2A output current (guaranteed 800mA), operating from 2.7V–5.5V input, and supporting logic-controlled output voltages of 3.4V/4.6V/5.1V for backlighting, keyboard, and RGB LED systems.
For engineers reviewing the MAX1577YETA+TG47 datasheet, MAX1577YETA+TG47 pinout, MAX1577YETA+TG47 application, or MAX1577YETA+TG47 equivalent, key selection considerations include adaptive 1x/2x charge-pump operation, three-level digital dimming (20%/33%/100%), current-sense threshold control (60mV/100mV/300mV), thermal shutdown at +160°C, and TDFN-8 (3mm × 3mm) package compatibility with high-current LED drive requirements.
Technical Context
The MAX1577YETA+TG47 implements an adaptive switching architecture that transitions between 1x LDO and 2x charge-pump modes based on input-to-output voltage differential-enabling high efficiency (up to 92%) in movie mode while sustaining regulated current during flash pulses. It uses dual enable inputs (EN1/EN2) to select output voltage level and current scale simultaneously.
Current regulation is achieved by sensing voltage across an external resistor (RCS) with thresholds of 60mV, 100mV, or 300mV depending on EN1/EN2 states; voltage regulation occurs when VOUT–VCS < 24mV, enabling fixed 3.4V/4.6V/5.1V outputs. Soft-start limits inrush current with a 0.5ms ramp, and overvoltage protection clamps output at 5.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 1.2A (800mA guaranteed); supports high-brightness strobe pulses and sustained movie-mode illumination. |
| Input Voltage Range | 2.7V to 5.5V; compatible with single-cell Li-ion and Li-polymer batteries across full discharge curve. |
| Output Voltage Options | Logic-selectable 3.4V, 4.6V, or 5.1V; enables flexible use across backlight, keyboard, and RGB LED subsystems. |
| Switching Frequency | 1MHz (0.8–1.25MHz range); allows use of small 1µF/2.2µF ceramic flying capacitors and compact layout. |
| Current Regulation Accuracy | ±3% over line and temperature; ensures consistent LED brightness despite battery sag and ambient variation. |
| Thermal Shutdown Threshold | +160°C with 20°C hysteresis; prevents damage during continuous high-current operation or poor PCB thermal design. |
| Shutdown Supply Current | 0.01µA typical at +25°C; minimizes battery drain in standby or off-state mobile device configurations. |
Pinout & Package
MAX1577YETA+TG47 is housed in an 8-pin, 3mm × 3mm, 0.8mm max height TDFN package with exposed pad (EP) connected to GND for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN1 | Logic control input | Selects dimming level (20%/33%/100%) or voltage mode (3.4V/4.6V/5.1V) together with EN2; PWM-capable up to 5kHz. |
| 2 - CP | Flying capacitor positive node | Connects to positive terminal of 1µF (≤600mA) or 2.2µF (>600mA) ceramic transfer capacitor; critical for charge-pump energy transfer. |
| 3 - CN | Flying capacitor negative node | Connects to negative terminal of same flying capacitor as CP; forms switched-capacitor stage with CP and internal switches. |
| 4 - EN2 | Logic control input | Co-acts with EN1 to define output mode; holding EN2 high enables PWM dimming on EN1 without repeated soft-start. |
| 5 - GND | Power and signal reference | Primary ground return; must be connected to EP (exposed pad) for thermal and electrical integrity. |
| 6 - IN | Main power input | Accepts 2.7V–5.5V battery or supply; requires 4.7µF ceramic decoupling close to pin for stable LDO/charge-pump operation. |
| 7 - CS | Current-sense feedback input | Senses voltage drop across external RCS resistor; determines regulated LED current (60mV/100mV/300mV thresholds). |
| 8 - OUT | Regulated output driver | Delivers controlled current to LED anodes; pulled to GND via 5kΩ internal resistor during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive 1x/2x charge-pump | Automatically switches between LDO and boost modes to maintain regulation across wide VIN–VOUT differentials, maximizing efficiency in both flash and movie modes. |
| Three-level digital dimming | EN1/EN2 logic combinations deliver precise 20%, 33%, or 100% full-scale current without external PWM circuitry-reducing BOM count and layout complexity. |
| Voltage-mode regulation | Supports 3.4V/4.6V/5.1V fixed outputs via EN1/EN2 states-enabling shared use across display backlight, keypad, and RGB indicator subsystems. |
| Low-noise 1MHz operation | Minimizes EMI and input ripple; permits use of tiny, low-ESR ceramic capacitors (1µF/2.2µF flying, 4.7µF input, 10µF output) for space-constrained mobile designs. |
| Integrated thermal protection | Shuts down at +160°C junction temperature and auto-restarts after 20°C cooldown-eliminating need for external thermal monitoring in portable devices. |
Applications
| Camera Flash Strobe | Smartphone Main Display Backlight |
|---|---|
Use Scenario: Short-duration, high-intensity illumination for smartphone camera capture in low-light conditions. IC Role / Device Role / Timing Role: High-current charge-pump driver delivering up to 1.2A regulated current to parallel white LEDs with fast turn-on response. Use Value: Enables bright, consistent flash output even at low battery voltage (2.7V), extending usable battery life per photo session. | Use Scenario: Continuous, adjustable brightness for AMOLED or LCD main display in smartphones and tablets. IC Role / Device Role / Timing Role: Voltage-regulated LED driver providing 3.4V/4.6V/5.1V outputs selected by host processor for optimal panel Vf matching. Use Value: Reduces power loss vs. linear drivers by using adaptive 1x/2x topology-improving battery runtime during video playback and UI navigation. |
| RGB Indicator Lighting | Front-Facing Camera Movie Light |
Use Scenario: Color-mixed status indication using red/green/blue LEDs in wearable or IoT edge devices. IC Role / Device Role / Timing Role: Programmable voltage regulator supplying precise 3.4V (red), 4.6V (green), or 5.1V (blue) to individual LED strings. Use Value: Eliminates need for separate regulators per color channel-simplifying power architecture and reducing component count. | Use Scenario: Low-power, continuously lit illumination for front-facing video calls and selfie capture. IC Role / Device Role / Timing Role: Efficient current-regulated driver operating in 1x LDO mode at ~92% PLED/PBATT efficiency during sustained 20–100% brightness levels. Use Value: Delivers flicker-free, thermally stable lighting with minimal heat buildup-critical for user-facing proximity-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED charge-pump driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1577ZETA+ | Fixed 5.1V output voltage; no logic-selectable 3.4V/4.6V modes; identical pinout and current capability. | Suitable only for fixed-voltage flash or backlight applications where voltage flexibility is unnecessary. | Choose MAX1577ZETA+ when system requires only 5.1V output and simpler enable logic-reducing firmware complexity. |
| TPS61165DRVR | Single-enable, PWM-dimmable 400mA boost converter; lacks multi-level digital dimming and voltage-mode selection. | Targeted at lower-current backlighting; not rated for >600mA flash duty cycles or thermal stress of strobe operation. | Use TPS61165DRVR only for cost-sensitive, low-power display backlighting-not for camera flash or RGB voltage-flexible designs. |
Compared with MAX1577ZETA+, MAX1577YETA+TG47 adds voltage-mode flexibility for multi-function LED systems; compared with TPS61165DRVR, it delivers 3× higher current, integrated thermal protection, and hardware-based dimming-making it uniquely suited for dual-role (flash + movie light) mobile imaging power management.
Availability
MAX1577YETA+TG47 is available at Aetrix Electronics and suitable for smartphone camera modules, portable display backlighting, and RGB status lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX1577YETA+TG47 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for portable, industrial, and communications applications.
The MAX1577Y series belongs to Maxim's white LED driver product line, engineered specifically for dual-mode (flash + movie) illumination in space- and power-constrained mobile devices-balancing peak current delivery with thermal robustness and voltage flexibility.
FAQ
What is the maximum guaranteed output current for MAX1577YETA+TG47?
The MAX1577YETA+TG47 guarantees 800mA output current across its full operating temperature range (–40°C to +85°C), with typical capability up to 1.2A under optimized conditions (e.g., VIN = 3.4V, VLED = 4.1V). This rating ensures reliable flash performance even under worst-case battery voltage and thermal conditions. The MAX1577YETA+TG47 datasheet specifies this limit in the Electrical Characteristics table under "Maximum OUT Current".
How does MAX1577YETA+TG47 select between 3.4V, 4.6V, and 5.1V output modes?
The MAX1577YETA+TG47 selects output voltage using the logic states of EN1 and EN2 pins per Table 1 in its datasheet: EN1 = GND / EN2 = IN → 3.4V; EN1 = IN / EN2 = GND → 4.6V; EN1 = EN2 = IN → 5.1V. This voltage-mode operation activates when the voltage across the sense resistor (VOUT–VCS) falls below 24mV. The MAX1577YETA+TG47 does not require external programming-mode selection is purely logic-driven.
Can MAX1577YETA+TG47 be used for PWM dimming, and what is the supported frequency range?
Yes, the MAX1577YETA+TG47 supports PWM dimming by applying a signal to EN1 while holding EN2 high-enabling smooth brightness control from 20% to 100%. The IC accepts PWM frequencies up to 5kHz without instability or audible noise. The MAX1577YETA+TG47 maintains regulation accuracy across the full duty cycle range, and its logic inputs tolerate 1.6V–5.5V high-level signals regardless of input supply voltage.
What is the recommended flying capacitor value for MAX1577YETA+TG47 at 1A output current?
For 1A output current, the MAX1577YETA+TG47 requires a 2.2µF ceramic flying capacitor (C1) connected between CP and CN pins. A 1µF capacitor is sufficient only for ≤600mA applications. Using the correct value prevents excessive voltage ripple, ensures stable 2x charge-pump operation, and avoids premature thermal shutdown. The MAX1577YETA+TG47 datasheet explicitly specifies this in the Capacitor Selection section and Figure 2 notes.
Does MAX1577YETA+TG47 include overvoltage protection, and what is the trip threshold?
Yes, the MAX1577YETA+TG47 includes output overvoltage protection (OVP) that limits VOUT to 5.3V maximum. The exact OVP threshold varies slightly with EN1/EN2 states in MAX1577Y configuration (e.g., 5.15V, 5.17V, or 5.30V), but never exceeds 5.3V. This protects downstream LEDs and PCB traces from damage during open-circuit or transient fault conditions. The MAX1577YETA+TG47 implements this protection internally without external components.
MAX1577YETA+TG47 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- -
- Topology:
- -
- Internal Switch(s):
- -
- Number of Outputs:
- -
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- -
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX1577YETA+TG47 FAQ
1.How can I place an order for MAX1577YETA+TG47 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1577YETA+TG47 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 MAX1577YETA+TG47 reliable?
The price and inventory of MAX1577YETA+TG47 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1577YETA+TG47 is usually 5 days.
3.What payment methods are accepted for MAX1577YETA+TG47?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1577YETA+TG47 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1577YETA+TG47?
MAX1577YETA+TG47 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1577YETA+TG47 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 MAX1577YETA+TG47?
For technical support, including MAX1577YETA+TG47 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1577YETA+TG47 requirements.
6.How does Aetrix verify that MAX1577YETA+TG47 is sourced from the original manufacturer or authorized distributors?
All MAX1577YETA+TG47 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 MAX1577YETA+TG47 meets industry standards.
7.What is the process for return or replacement of MAX1577YETA+TG47?
All MAX1577YETA+TG47 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1577YETA+TG47, 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 MAX1577YETA+TG47 part is unused and in its original packaging.
Return procedure for MAX1577YETA+TG47:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1577YETA+TG47 Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
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BCR420UFD-7
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BCR421UFD-7
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