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Analog Devices Inc. LT1313CS#TRPBF
- Part No.:
- LT1313CS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1313CS#TRPBF.pdf
- Description:
- IC REG PCMCIA DRVR 2OUT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,902
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Product details
Overview
LT1313CS#TRPBF from Analog Devices (acquired Linear Technology) is a dual-channel PCMCIA VPP driver/regulator IC that delivers independently programmable 0V, 3.3V, 5V, 12V or Hi-Z regulated outputs from a single 13V–20V unregulated supply. It provides 120mA per channel, features independent VPP valid status feedback, and supports automatic 3.3V/5V switching based on sensed VCC voltage - used in notebook, palmtop, and pen-based computer PCMCIA slot interfaces.
For engineers reviewing the LT1313CS#TRPBF datasheet, LT1313CS#TRPBF pinout, LT1313CS#TRPBF application, or LT1313CS#TRPBF equivalent, key selection criteria include dual-channel VPP regulation accuracy (±4% at 12V), low 60µA quiescent current in Hi-Z/0V mode, thermal shutdown protection, and compatibility with standard PC Card interface controllers such as CL-PD6720 and "365"-type controllers.
Technical Context
The LT1313CS#TRPBF integrates two PNP-based low-dropout linear regulators with built-in 330mA current limiting and thermal shutdown. Each channel uses four digital enable inputs (AEN0/AEN1, BEN0/BEN1) plus two independent VCC sense comparators to select output modes: 0V, 3.3V, 5V, 12V, or Hi-Z.
Its VPPVALID open-collector outputs assert low when corresponding VPPOUT exceeds 11V (e.g., during 12V regulation), and internal logic ensures no VPP overshoot with 1µF tantalum output capacitors. The device operates across 0°C–70°C and requires both VS pins (10,14) and both GND pins (1,5) to be tied together.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Accuracy | ±4% at 12V (11.52V–12.48V), ±5% at 5V (4.75V–5.25V), ±5% at 3.3V (3.135V–3.465V) |
| Max Output Current | 120mA per channel at 12V; 30mA per channel at 3.3V/5V - sufficient for PCMCIA card programming and erase cycles |
| Quiescent Current | 60µA per channel in 0V or Hi-Z mode - enables ultra-low-power standby in portable systems |
| VPP Valid Threshold | 11V minimum assertion level for AVALID/BVALID - ensures reliable detection of stable 12V regulation |
| VCC Sense Thresholds | 4.05V typical switch-to-5V threshold; 4.00V typical switch-to-3.3V threshold - provides hysteresis for clean VCC-mode transitions |
| Supply Voltage Range | 13V to 20V unregulated input - compatible with auxiliary windings of DC/DC converters like LTC1142HV |
| Enable Input Compatibility | CMOS-compatible thresholds (VENH ≥2.4V, VENL ≤0.4V) - directly interfaces with 3.3V/5V logic controllers |
Pinout & Package
The LT1313CS#TRPBF is housed in a 16-pin narrow-body SOIC (SO-16N) package with exposed pad not present; both VS pins (10,14) and both GND pins (1,5) must be externally connected in parallel for proper operation and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1,5) | Power ground reference | Two dedicated ground pins require common connection to minimize ground bounce and ensure thermal stability |
| VS (10,14) | Unregulated power input | Two supply pins must be tied together and bypassed with ≥0.1µF capacitor near device for ripple suppression |
| AVPPOUT / BVPPOUT (9,13) | Regulated VPP output | Each drives one PCMCIA slot's VPP pins; supports 120mA load with 1µF tantalum output capacitor |
| AEN0/AEN1 / BEN0/BEN1 (2,3,6,7) | Digital mode selection inputs | Four high-impedance CMOS inputs configure output voltage per channel (0V/3.3V/5V/12V/Hi-Z) per truth table |
| ASENSE / BSENSE (12,16) | VCC voltage sensing input | Connects to PCMCIA slot VCC to enable automatic 3.3V↔5V VPP switching via internal 4V comparator |
| AVALID / BVALID (4,8) | Open-collector status output | Sinks ≥1mA when corresponding VPPOUT ≥11V - requires external 51kΩ pull-up to 3.3V/5V logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent VPP regulation | Enables simultaneous control of two PCMCIA slots without cross-talk or shared timing constraints |
| No VPP overshoot with 1µF output cap | Eliminates risk of overvoltage damage during power-up in flash memory programming applications |
| Automatic VCC-synchronized switching | Ensures VPP matches card VCC (3.3V or 5V) without software intervention or external logic |
| Thermal shutdown + current limiting | 330mA current limit and junction temperature cutoff at 125°C protect against socket short circuits |
| 60µA quiescent current in Hi-Z mode | Reduces system standby power in battery-powered palmtops and hand-held terminals |
Applications
| Notebook Computers | Palmtop Computers |
|---|---|
Use Scenario: Dual PCMCIA slot interface in compact notebook designs requiring legacy expansion support. IC Role / Device Role / Timing Role: Dual VPP regulator providing independently controlled 12V programming voltage and 0V/Hi-Z safe state for SRAM and flash cards. Use Value: Enables single-supply 13V–20V operation while meeting JEDEC PCMCIA VPP timing and voltage compliance for Type I/II cards. | Use Scenario: Low-power PCMCIA host interface in space-constrained palmtop systems with battery life constraints. IC Role / Device Role / Timing Role: VPP driver delivering 120mA per slot with 60µA quiescent current in Hi-Z mode during card insertion detection. Use Value: Extends battery runtime by minimizing leakage during idle states while maintaining fast 12V turn-on (<40µs) for card programming. |
| Pen-Based Computers | Flash Memory Programming |
Use Scenario: Ruggedized pen-computers using PCMCIA for field-upgradable firmware modules. IC Role / Device Role / Timing Role: Dual-channel regulator supplying precise 12V VPP to erase/program flash cards and 0V for safe hot-plug sequencing. Use Value: Prevents data corruption via independent VPPVALID feedback and no-overshoot regulation during dynamic card swaps. | Use Scenario: Embedded flash programming station interfacing with industrial memory cards via PCMCIA. IC Role / Device Role / Timing Role: High-accuracy VPP source delivering ±4% 12V output with thermal protection during extended write cycles. Use Value: Guarantees consistent programming voltage across temperature (0°C–70°C), reducing bit-error rates in production test environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel PCMCIA VPP regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1312CS#TRPBF | Single-channel version; identical specs per channel but only one VPP output | Requires two units for dual-slot support; increases board area and BOM count | Select when only one PCMCIA slot is needed or when channel isolation mandates separate regulators |
| LTC1315CG#TRPBF | Dual switch matrix (not regulator); no VPP generation capability - only routes existing VPP/VCC | Must be paired with external VPP source; lacks integrated regulation, current limiting, or VCC sensing | Choose for systems already generating VPP externally and needing only signal routing and protection |
Compared with LT1313CS#TRPBF, LT1312CS#TRPBF offers half the channel count but identical per-channel performance, while LTC1315CG#TRPBF provides switching functionality only and cannot replace the LT1313CS#TRPBF's integrated regulation, VCC-sensing, and protection features in standalone VPP generation roles.
Availability
LT1313CS#TRPBF is available at Aetrix Electronics and suitable for notebook computers, palmtop computing devices, and flash memory programming equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LT1313CS#TRPBF 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 its precision analog and power management product lines. Linear Technology was founded in 1981 and specialized in high-performance linear ICs for demanding applications.
The LT1313CS#TRPBF belongs to Linear Technology's PCMCIA driver/regulator family, designed specifically to simplify dual-slot PC Card interface design in portable computing by integrating regulation, sensing, protection, and status feedback into a single 16-pin SOIC.
FAQ
What is the maximum output current per channel for the LT1313CS#TRPBF?
The LT1313CS#TRPBF delivers up to 120mA per channel when regulating to 12V, and up to 30mA per channel at 3.3V or 5V. Its internal 330mA current limit and thermal shutdown protect against sustained overload, making it suitable for PCMCIA flash card programming where peak currents occur during erase cycles. This rating is confirmed across the full 0°C–70°C operating range.
Does the LT1313CS#TRPBF support automatic VPP voltage switching based on card VCC?
Yes, the LT1313CS#TRPBF includes two independent VCC sense comparators (ASENSE/BSENSE) that automatically switch each VPP output between 3.3V and 5V based on the detected VCC voltage at the corresponding PCMCIA slot. The switch-to-5V threshold is 4.05V typical, and the switch-to-3.3V threshold is 4.00V typical, with built-in hysteresis to prevent oscillation during transitions.
What output capacitor value is required for stable operation of the LT1313CS#TRPBF?
The LT1313CS#TRPBF is stable with a minimum 1µF tantalum capacitor (ESR ≤3Ω) placed directly between each VPPOUT pin and ground. Ceramic capacitors below 1µF require a 2Ω series resistor to ensure stability. The device's transient response - including <40µs 0V-to-12V rise time - is characterized with 1µF to 10µF tantalum capacitors, and larger values slow slew rate without compromising regulation.
How does the LT1313CS#TRPBF indicate valid VPP regulation?
The LT1313CS#TRPBF provides two open-collector VPPVALID outputs (AVALID/BVALID) that sink ≥1mA when the corresponding VPPOUT reaches and maintains ≥11V - indicating stable 12V regulation. These outputs require external 51kΩ pull-up resistors to the same 3.3V or 5V logic rail powering the controller, and are asserted independently per channel regardless of other output states.
What is the quiescent current of the LT1313CS#TRPBF in Hi-Z mode?
The LT1313CS#TRPBF draws only 60µA per channel in Hi-Z or 0V mode, as specified in the Electrical Characteristics table under IS (Supply Current). This ultra-low quiescent current is maintained across the full 13V–20V supply range and enables extended battery life in portable applications such as palmtop and pen-based computers where VPP is frequently held in Hi-Z during card presence detection.
LT1313CS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- PCMCIA Driver/Regulator, PCMCIA Card Slot
- Voltage - Input:
- 13V ~ 20V
- Number of Outputs:
- 2
- Voltage - Output:
- 3.3V, 5V, 12V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1313CS#TRPBF FAQ
1.How can I place an order for LT1313CS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1313CS#TRPBF 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 LT1313CS#TRPBF reliable?
The price and inventory of LT1313CS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1313CS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1313CS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1313CS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1313CS#TRPBF?
LT1313CS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1313CS#TRPBF 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 LT1313CS#TRPBF?
For technical support, including LT1313CS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1313CS#TRPBF requirements.
6.How does Aetrix verify that LT1313CS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1313CS#TRPBF 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 LT1313CS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1313CS#TRPBF?
All LT1313CS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1313CS#TRPBF, 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 LT1313CS#TRPBF part is unused and in its original packaging.
Return procedure for LT1313CS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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