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Analog Devices Inc. LTC1263IS8#PBF
- Part No.:
- LTC1263IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1263IS8#PBF.pdf
- Description:
- IC REG CONV PROG SUP 1OUT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
LTC1263IS8#PBF from Analog Devices (formerly Linear Technology) is a regulated charge-pump DC/DC converter designed to generate a stable 12V ±5% programming supply for byte-wide flash memory. It delivers guaranteed 60mA output current from a 4.75V–5.5V input, requires no inductors, uses only four external capacitors, and features TTL-compatible active-high shutdown with 0.5µA typical quiescent current in shutdown mode - deployed in flash programming circuits on embedded microcontroller boards.
For engineers reviewing the LTC1263IS8#PBF datasheet, LTC1263IS8#PBF pinout, LTC1263IS8#PBF application, or LTC1263IS8#PBF equivalent, key selection criteria include regulated 12V output tolerance, inductorless charge-pump architecture, 8-pin SO package compatibility with LTC1262/MAX662, shutdown current spec, and flash-memory VPP timing compliance.
Technical Context
The LTC1263IS8#PBF implements a tripler charge-pump topology clocked by an internal 300kHz oscillator, using two 0.47µF flying capacitors (C1, C2) and dual 10µF output/input bypass capacitors. Regulation is achieved via comparator-based pulse gating of the charge pump, comparing a resistor-divided VOUT against a bandgap reference with hysteresis.
Internal switch gates are driven between GND and the higher of VCC or VOUT to ensure proper operation across startup and regulation transitions. During shutdown, VOUT is internally shorted to VCC, and the bandgap, oscillator, and comparator are disabled - reducing ICC to 0.5µA typical while maintaining VOUT = VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12V ±5% (11.4V–12.6V), tightly regulated for flash VPP programming compliance |
| Max Output Current | 60mA continuous, sufficient for standard byte-wide flash write cycles |
| Input Voltage Range | 4.75V to 5.5V, compatible with standard 5V logic rails and tolerant of rail droop |
| Shutdown Current | 0.5µA typical, enables ultra-low-power retention during flash standby |
| Oscillator Frequency | 300kHz typical, determines charge-pump switching speed and ripple frequency |
| Turn-On Time | 600µs typical to reach 11.4V, meets fast VPP ramp requirements in microcontroller bootloaders |
| Turn-Off Time | 10ms typical for VOUT decay to VCC, prevents unintended reprogramming during power-down |
Pinout & Package
Package: 8-lead plastic SO (narrow, 0.150" width), RoHS-compliant, surface-mountable, thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1– (Pin 1) | Flying capacitor negative terminal | Connects to negative plate of 0.47µF ceramic flying cap C1; critical for charge transfer efficiency |
| C1+ (Pin 2) | Flying capacitor positive terminal | Connects to positive plate of C1; forms first stage of tripler charge pump |
| C2– (Pin 3) | Second flying capacitor negative terminal | Connects to negative plate of second 0.47µF flying cap C2; enables voltage stacking |
| C2+ (Pin 4) | Second flying capacitor positive terminal | Connects to positive plate of C2; completes dual-capacitor charge-pump structure |
| VCC (Pin 5) | Main supply input | Accepts 4.75V–5.5V; requires 10µF bypass to GND for stability and transient response |
| VOUT (Pin 6) | Regulated 12V output | Delivers up to 60mA; internally shorted to VCC in shutdown; requires ≥10µF output capacitor |
| GND (Pin 7) | Analog and power ground | Common return for all internal circuitry and external capacitors; must be low-impedance |
| SHDN (Pin 8) | Active-high TTL shutdown control | Pulled up internally to VCC; drive low for normal operation; float or tie high for 0.5µA shutdown |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates EMI, size, and cost penalties of magnetic components - ideal for space-constrained flash programming modules |
| Guaranteed 60mA output | Meets worst-case VPP current demand of Intel/AMD-style byte-wide flash parts without derating |
| Same pinout as LTC1262 and MAX662 | Enables drop-in replacement or design reuse across 30mA/60mA flash supply variants in existing SO-8 layouts |
| Short-circuit tolerant output | VOUT can be momentarily shorted to GND without damage - supports robust test/debug interfaces |
| Low-noise regulated output | Uses hysteresis-controlled oscillator gating instead of PWM, minimizing switching noise coupling into sensitive flash control lines |
Applications
| Flash Memory Programming | Dual-Supply Op Amp Biasing |
|---|---|
Use Scenario: Generating VPP for in-system programming of 5V-tolerant parallel flash memory (e.g., SST39VF series) on microcontroller development boards. IC Role / Device Role / Timing Role: Dedicated 12V programming supply with fast turn-on (<600µs) and precise ±5% regulation to meet JEDEC VPP timing windows. Use Value: Eliminates need for external DC/DC modules or discrete charge pumps, reducing BOM count and PCB area by >40% versus inductor-based alternatives. | Use Scenario: Powering dual-rail op amps (e.g., LT1006) requiring +12V and –7V supplies from a single 5V rail in portable instrumentation. IC Role / Device Role / Timing Role: Primary 12V source enabling cascaded diode-capacitor networks to derive negative and boosted rails without additional regulators. Use Value: Achieves ±7V/±12V split supplies with <1% load regulation drift across 0–60mA, supporting precision analog front-ends in battery-powered devices. |
| Microcontroller Bootloader Support | PCMCIA Card Interface |
Use Scenario: Providing controlled VPP during firmware update sequences in industrial PLC controllers where flash erase/write must occur only under validated conditions. IC Role / Device Role / Timing Role: Shutdown-controlled 12V source synchronized to MCU GPIO to prevent accidental programming during reset or brownout. Use Value: 0.5µA shutdown current extends system sleep time; TTL-compatible SHDN allows direct connection to MCU I/O without level-shifting. | Use Scenario: Supplying VPP for PCMCIA Type I/II card hot-plug programming in embedded host systems (e.g., ruggedized laptops, medical data loggers). IC Role / Device Role / Timing Role: Regulated 12V source meeting PCMCIA JEIDA-4.2 VPP specification (12V ±0.5V, 60mA min) with fast transient recovery. Use Value: Meets PCMCIA VPP accuracy and current requirements without external trimming or feedback compensation components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory programming supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1262CS8 | 30mA max output, same 8-pin SO package and pinout, identical shutdown behavior and regulation scheme | Insufficient for flash parts requiring >40mA VPP; suitable only for low-density or older flash families | Select LTC1262CS8 only when VPP current demand is confirmed ≤30mA and layout reuse is prioritized |
| MAX662ACSA+ | 60mA output, 12V ±4%, uses different charge-pump topology; not pin-compatible - SHDN and capacitor pins differ | Requires PCB redesign; offers tighter initial tolerance but higher EMI due to fixed-frequency PWM control | Choose MAX662ACSA+ only if ±4% output tolerance is mandatory and board revision is feasible |
Compared with LTC1262CS8 and MAX662ACSA+, the LTC1263IS8#PBF uniquely balances 60mA capability, pin compatibility with legacy designs, and inductorless simplicity - making it optimal for new 5V-based flash programming implementations where layout continuity and reliability are critical.
Availability
LTC1263IS8#PBF is available at Aetrix Electronics and suitable for flash memory programming, dual-rail op amp biasing, and PCMCIA interface applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for LTC1263IS8#PBF 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
Analog Devices acquired Linear Technology in 2017 and maintains full product support, datasheet archives, and application engineering for legacy Linear parts including the LTC1263 family.
The LTC1263 belongs to Linear's precision charge-pump DC/DC converter product line, engineered specifically for low-noise, inductorless voltage boosting in memory programming and analog signal-chain biasing applications.
FAQ
What is the maximum continuous output current of the LTC1263IS8#PBF?
The LTC1263IS8#PBF guarantees 60mA continuous output current across the full operating temperature range (0°C to 70°C) and input voltage range (4.75V to 5.5V). Absolute maximum rating allows 90mA briefly, but sustained operation above 60mA risks regulation loss and thermal stress. This rating ensures reliable VPP delivery for JEDEC-compliant flash memory programming cycles without derating.
Can the LTC1263IS8#PBF be used to generate voltages other than +12V?
Yes - the LTC1263IS8#PBF's charge-pump architecture supports derived outputs: adding two diodes and two capacitors enables +19V (boosted) and –7V (inverted) rails, as documented in Linear's TA04 and TA05 schematics. These configurations retain the LTC1263IS8#PBF as the core 12V source but require external passive components and load balancing per application note guidance.
Is the LTC1263IS8#PBF pin-compatible with the LTC1262?
Yes - the LTC1263IS8#PBF shares identical 8-pin SO package dimensions and pin mapping with the LTC1262, including matching C1–, C1+, C2–, C2+, VCC, VOUT, GND, and SHDN assignments. This allows direct PCB-level substitution where higher output current (60mA vs. 30mA) is needed, provided thermal and layout margins accommodate the increased power dissipation of the LTC1263IS8#PBF.
What is the typical turn-on time for the LTC1263IS8#PBF?
The typical turn-on time for the LTC1263IS8#PBF is 600µs - defined as the time required for VOUT to rise from VCC to the lower regulation limit of 11.4V after SHDN is pulled low. This value assumes standard external capacitors (C1 = C2 = 0.47µF, CIN = COUT = 10µF) and is critical for meeting flash memory VPP setup timing in bootloader sequences using the LTC1263IS8#PBF.
Does the LTC1263IS8#PBF require a minimum load to maintain regulation?
No - the LTC1263IS8#PBF maintains regulation from 0mA to 60mA output current without requiring a minimum load. Its hysteresis-based oscillator gating adapts dynamically to load changes, and output voltage remains within ±5% (11.4V–12.6V) across the full specified load range, as verified in Electrical Characteristics Table and TPC02 performance curves.
LTC1263IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Converter, Programming Supply
- Voltage - Input:
- 4.75V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 12V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC1263IS8#PBF FAQ
1.How can I place an order for LTC1263IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1263IS8#PBF 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 LTC1263IS8#PBF reliable?
The price and inventory of LTC1263IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1263IS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1263IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1263IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1263IS8#PBF?
LTC1263IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1263IS8#PBF 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 LTC1263IS8#PBF?
For technical support, including LTC1263IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1263IS8#PBF requirements.
6.How does Aetrix verify that LTC1263IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1263IS8#PBF 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 LTC1263IS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1263IS8#PBF?
All LTC1263IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1263IS8#PBF, 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 LTC1263IS8#PBF part is unused and in its original packaging.
Return procedure for LTC1263IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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