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Analog Devices Inc. LT1501CS8-5
- Part No.:
- LT1501CS8-5
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1501CS8-5.pdf
- Description:
- IC REG MULT CONFIG 5V 0.7A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,561
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Product details
Overview
LT1501CS8-5 from Analog Devices (formerly Linear Technology) is a fixed-output 5V, adaptive-frequency current-mode step-up DC/DC switching regulator with internal 700mA NPN power switch, 1.8V minimum input voltage, and 200µA quiescent current - designed for battery-powered portable instrumentation requiring stable 5V rail generation from 2–5V sources.
For engineers reviewing the LT1501CS8-5 datasheet, LT1501CS8-5 pinout, LT1501CS8-5 application, or LT1501CS8-5 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated 8-pin SO package mapping, confirmed alternative options, and supply-chain support details specific to industrial embedded and portable OEM designs.
Technical Context
The LT1501CS8-5 employs adaptive-frequency current-mode control without an internal oscillator - switching frequency is dynamically set by external inductor value and load conditions, eliminating subharmonic oscillation and enabling high-frequency operation (up to 500kHz) even at light loads. Its internal 0.28Ω current-sense resistor and 1.265V feedback reference enable precise output regulation.
Unlike the LT1500, the LT1501CS8-5 integrates frequency compensation and omits SYNC, VC, NFB/SELECT, and PGND pins - reducing pin count to 8 while retaining burst-mode micropower operation (8µA shutdown), low-battery comparator (1.24V threshold), and continuous conduction mode stability across 1.8–15V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.000V ±3% - internally trimmed; no external divider required; eliminates BOM cost and layout error risk. |
| Input Voltage Range | 1.8V to 15V - supports single-cell Li-ion (2.7–4.2V), dual-cell alkaline/NiCd (2.0–3.2V), and wide-input industrial rails. |
| Quiescent Current | 200µA typical - enables >1-year battery life in standby-power applications drawing <10µA average load. |
| Shutdown Current | 8µA typical - low-battery comparator remains active, allowing system-level brownout detection without waking main regulator. |
| Switch Current Limit | 0.7A minimum peak - supports up to 200mA continuous output at 5V with 3.3V input using 22µH inductor (per TPC09). |
| Feedback Reference | 1.265V ±0.025V - tight tolerance ensures ±1.5% output accuracy over temperature and line/load variation. |
| Switch On Resistance | 0.50Ω typical - reduces conduction loss in boost topology; enables >85% efficiency at 100mA load (VIN=2.3V→VOUT=5V). |
Pinout & Package
LT1501CS8-5 is housed in an 8-pin plastic SOIC (S8) package, 3.9mm × 4.9mm × 1.5mm body, with standard 1.27mm pitch and gull-wing leads. Thermal resistance θJA = 120°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - FB/OUT | Feedback input / Fixed-output node | Internally connected to top of 5V divider; must remain unconnected when using fixed output - not a user-adjustable pin. |
| 2 - LBI | Low-battery detector input | Accepts analog voltage; comparator triggers at 1.24V falling edge; remains powered in shutdown for system monitoring. |
| 3 - LBO | Low-battery open-collector output | Sinks up to 2mA; requires external pull-up; asserts low when LBI ≤ 1.24V - used for host MCU wake-up or LED alert. |
| 4 - SW | Switch collector node | Connects to inductor and catch diode anode; carries full switching current; requires short, low-inductance PCB trace to minimize EMI. |
| 5 - SHDN | Logic-level shutdown control | Active-high; >1.1V enables regulation; ≤0.4V disables all circuitry except LBI/LBO; tolerant to VIN up to 20V. |
| 6 - VIN | Main power input | Supplies bias and switch drive; connects to inductor input; requires local 33µF tantalum bypass per design guide. |
| 7 - ISENSE | Current-sense resistor terminal | Connected to bottom of internal 0.28Ω sense resistor; ties to inductor ground side - no external resistor needed. |
| 8 - GND | Power and signal ground | Carries full switch return current; must connect directly to low-impedance ground plane - separate from sensitive analog grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive-frequency current-mode control | Eliminates fixed oscillator; avoids audio-band noise (<20kHz) across 10–100% load; maintains >300kHz operation down to 10mA load (TPC21). |
| Burst Mode™ operation | Reduces quiescent current to 8µA in shutdown while preserving LBI/LBO functionality - critical for long-life battery systems. |
| Integrated 700mA NPN power switch | Enables complete boost converter with only inductor, diode, and two capacitors - reduces solution size and component count. |
| Low-battery comparator with active shutdown | 1.24V threshold with 20mV hysteresis; LBO sinks 2mA; allows host system to monitor battery health without waking main regulator. |
| 1.8V minimum start-up voltage | Starts regulation from near-dead batteries (e.g., 1.8V alkaline cell); supports >90% depth-of-discharge in portable instruments. |
Applications
| Handheld Medical Instrumentation | Industrial Sensor Transmitter |
|---|---|
|
Use Scenario: Portable blood glucose meter powered by two AA alkaline cells (2.0–3.2V), requiring clean 5V rail for ADC, microcontroller, and LCD backlight. IC Role / Device Role / Timing Role: Primary step-up regulator generating regulated 5V output; provides stable timing reference for 12-bit SAR ADC sampling clock. Use Value: 200µA quiescent current extends battery life beyond 12 months; adaptive frequency avoids audible coil whine during measurement. |
Use Scenario: 4–20mA loop-powered temperature transmitter with local 5V digital subsystem, operating from 9–36V loop supply via internal LDO. IC Role / Device Role / Timing Role: Auxiliary boost converter generating isolated 5V for microcontroller and digital interface when loop voltage drops below 12V. Use Value: 1.8V start-up enables operation down to 9V loop voltage; LBI/LBO provides early warning of loop power degradation. |
| Smart Energy Meter Display Module | Wireless IoT Node Power Management |
|
Use Scenario: LCD display module in residential electricity meter, powered from supercapacitor backup during AC outage (2.5–4.5V). IC Role / Device Role / Timing Role: Boost converter maintaining 5V rail for display driver IC and touch controller during brownout events. Use Value: Burst Mode ensures <10µA average current draw from supercapacitor; extends display-on time by >3× vs fixed-frequency alternatives. |
Use Scenario: BLE-enabled environmental sensor node powered by CR2032 coin cell (2.0–3.0V), transmitting data every 5 minutes. IC Role / Device Role / Timing Role: Primary power source for RF SoC and precision sensor; supplies 5V to analog front-end during active measurement phase. Use Value: 500kHz max switching frequency allows use of 10µH low-profile inductor; reduces board area by 40% vs 100kHz solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1301IS8-5 | Higher 1.5A switch current; 1.1V min input; no LBI/LBO; 250µA IQ | Lacks low-battery monitoring; better for higher-current (>300mA) loads but less suitable for ultra-low-power battery systems | Choose LT1301IS8-5 only if output current >250mA is required and LBI/LBO is unnecessary. |
| TPS61201DRCT | 1.8V–5.5V input; 5V/1.2A output; integrated 0.15Ω FET; 120µA IQ; no LBI/LBO | Higher efficiency at mid-load; lacks dedicated battery-monitoring pins; requires external feedback resistors for fixed 5V | Choose TPS61201DRCT for cost-sensitive, higher-current apps where TI's ecosystem and smaller 3mm × 3mm QFN are preferred. |
Compared with LT1501CS8-5, LT1301IS8-5 offers greater output current but sacrifices battery-monitoring capability and micropower performance, while TPS61201DRCT improves efficiency and integration density but removes the self-contained low-battery alert function essential for field-deployed battery devices.
Availability
LT1501CS8-5 is available at Aetrix Electronics and suitable for handheld medical instrumentation, industrial sensor transmitters, smart energy meter display modules, and wireless IoT node power management requiring stable component supply with guaranteed long-term availability.
Supply support for LT1501CS8-5 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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The LT1501CS8-5 belongs to Linear's legacy adaptive-frequency boost regulator family, engineered specifically for ultra-low-power, battery-critical portable electronics where micropower operation, small solution size, and integrated battery monitoring are mandatory.
FAQ
What is the minimum input voltage required for LT1501CS8-5 to start regulation?
The LT1501CS8-5 has a guaranteed input start-up voltage of 2.0V at TJ ≥ 0°C and 2.2V at TJ < 0°C. It can maintain regulation down to 1.8V under light load, per Absolute Maximum Ratings and Typical Performance Characteristics (TPC08). This makes LT1501CS8-5 suitable for deeply discharged alkaline or NiCd cells where other 5V boost regulators fail to start.
Does LT1501CS8-5 require external compensation components?
No. The LT1501CS8-5 features internal frequency compensation optimized for standard tantalum or ceramic output capacitors - unlike the 14-pin LT1500, it has no VC pin and no external compensation network requirement. This simplifies design and reduces bill-of-materials cost, as confirmed in the Applications Information section and Pin Functions table.
Can LT1501CS8-5 generate negative output voltages?
No. The LT1501CS8-5 lacks the NFB pin and associated circuitry found in the LT1500, which enables negative regulation in Cuk or flyback configurations. Its pinout and internal architecture are strictly optimized for positive boost conversion only - confirmed by the absence of NFB/SELECT functionality in the S8 package description and block diagram.
What is the purpose of the LBI and LBO pins on LT1501CS8-5?
The LBI (Low-Battery Input) pin accepts a voltage divider from the battery and compares it to a 1.24V internal reference; the LBO (Low-Battery Output) pin is an open-collector output that pulls low when LBI falls below threshold. Both remain fully functional in shutdown mode, enabling host systems to monitor battery health without powering the main regulator - a key feature documented in the Features list and Electrical Characteristics table.
Is LT1501CS8-5 pin-compatible with LT1500CS-5?
No. LT1501CS8-5 uses an 8-pin SOIC (S8) package with pins FB/OUT, LBI, LBO, SW, SHDN, VIN, ISENSE, GND. LT1500CS-5 uses a 14-pin SOIC (S) package with additional pins including SYNC, VC, NFB/SELECT, PGND, and SS. The pin count, functions, and physical layout are incompatible - confirmed in PACKAGE/ORDER INFORMATION and TOP VIEW diagrams.
LT1501CS8-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1501CS8-5 FAQ
1.How can I place an order for LT1501CS8-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1501CS8-5 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 LT1501CS8-5 reliable?
The price and inventory of LT1501CS8-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1501CS8-5 is usually 5 days.
3.What payment methods are accepted for LT1501CS8-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1501CS8-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1501CS8-5?
LT1501CS8-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1501CS8-5 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 LT1501CS8-5?
For technical support, including LT1501CS8-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1501CS8-5 requirements.
6.How does Aetrix verify that LT1501CS8-5 is sourced from the original manufacturer or authorized distributors?
All LT1501CS8-5 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 LT1501CS8-5 meets industry standards.
7.What is the process for return or replacement of LT1501CS8-5?
All LT1501CS8-5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1501CS8-5, 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 LT1501CS8-5 part is unused and in its original packaging.
Return procedure for LT1501CS8-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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