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Analog Devices Inc. LTC1522CMS8#TRPBF
- Part No.:
- LTC1522CMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1522CMS8#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP 5V 20MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,445
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Product details
Overview
LTC1522CMS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower regulated 5V charge pump DC/DC converter designed for low-current, battery-powered systems. It delivers up to 20mA output from a 2.7V–5V input, features 6µA typical operating supply current, ±4% output voltage regulation, and internal 700kHz oscillator - ideal for SIM interface supplies and smart card readers.
For engineers reviewing the LTC1522CMS8#TRPBF datasheet, LTC1522CMS8#TRPBF pinout, LTC1522CMS8#TRPBF application, or LTC1522CMS8#TRPBF equivalent, key selection criteria include ultralow quiescent current (<1µA in shutdown), thermal/short-circuit protection, no-inductor architecture, and compatibility with light-load GSM and PCMCIA power rails.
Technical Context
The LTC1522CMS8#TRPBF uses a two-phase nonoverlapping switched-capacitor topology to boost VIN to a regulated 5V output via internal comparator-controlled hysteresis (COMP1). Regulation is achieved by enabling the charge pump only when VOUT drops below the lower trip point, minimizing switching activity at light loads.
It integrates CMOS-level SHDN control with ~VIN/2 threshold, disconnects VOUT from VIN during shutdown, and employs on-chip thermal shutdown (~160°C trip, ~145°C recovery) to survive continuous VOUT-to-GND shorts without latchup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±4% (4.8V–5.2V); tightly regulated across 2.7V–5V input and 0–20mA load range. |
| Input Voltage Range | 2.7V to 5V; supports single-cell Li-ion, NiMH, and 3.3V system rails without external LDO pre-regulation. |
| Operating Supply Current | 6µA typical (no load); enables multi-year battery life in always-on sensor or backup supply applications. |
| Shutdown Current | <1µA (VIN ≤ 3.6V); isolates load from input, critical for zero-power standby modes. |
| Switching Frequency | 700kHz free-running; enables use of small 0.22µF ceramic flying capacitor and compact PCB layout (<0.1 in²). |
| Output Current Capability | 10mA (VIN ≥ 2.7V), 20mA (VIN ≥ 3V); sufficient for SIM card interfaces, smart card readers, and local 3V-to-5V conversion. |
| Output Ripple | 70mVP-P (VIN = 3V, IOUT = 10mA); manageable with standard 10µF low-ESR tantalum/ceramic output capacitor. |
Pinout & Package
Package: 8-pin MSOP (MS8), 3.0mm × 3.0mm body, 0.65mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No Connect | Unbonded die pad; must remain unconnected per datasheet to avoid parasitic coupling or ESD path disruption. |
| Pin 2 (VIN) | Input Supply | 2.7V–5V main power input; requires ≥3.3µF low-ESR bypass capacitor close to pin for stable start-up and ripple suppression. |
| Pin 3 (VOUT) | Regulated Output | 5V ±4% output; disconnected from VIN during shutdown; requires ≥3.3µF low-ESR capacitor for regulation stability. |
| Pin 4 (C+) | Flying Cap Positive | Connects to positive terminal of 0.22µF flying capacitor; forms charge-transfer node in 2-phase pump cycle. |
| Pin 5 (C−) | Flying Cap Negative | Connects to negative terminal of 0.22µF flying capacitor; completes charge-pump capacitor loop with C+. |
| Pin 6 (GND) | Ground Reference | Analog/digital ground return; must be tied to low-impedance ground plane adjacent to CIN/COUT placement. |
| Pin 7 (SHDN) | Active-High Shutdown | CMOS input (VIH ≈ 0.7×VIN, VIL ≤ 0.4V); drive low to enable, high to disable; must never float. |
| Pin 8 (NC) | No Connect | Unbonded die pad; leave unconnected to prevent noise injection or thermal impedance increase. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic components and EMI concerns; enables ultra-thin, space-constrained designs like SIM card slots and smart card modules. |
| Ultralow 6µA operating ICC | Extends battery life in always-on IoT sensors and backup memory supplies where microamp-level quiescent draw is mandatory. |
| Thermal + short-circuit protection | Survives indefinite VOUT-to-GND shorts with automatic cycling (160°C trip / 145°C recovery); no external protection circuitry required. |
| Load disconnection in shutdown | Prevents backfeed and leakage into powered-down subsystems - essential for rail isolation in multi-voltage embedded systems. |
| Pin-compatible with LTC1516 | Enables drop-in upgrade path in existing 2.7V–5V, ≤20mA designs where LTC1516 was used, with identical MSOP/SO footprint and pin mapping. |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Powering SIM card interface in GSM cellular handsets requiring dual 3V/5V logic levels and low standby current. IC Role / Device Role / Timing Role: Regulated 5V supply generator with programmable shutdown for SIM RST/CLK/I/O lines. Use Value: Enables single-supply 3.3V system to drive 5V-tolerant SIM cards while maintaining <1µA shutdown current for extended idle battery life. |
Use Scenario: Providing isolated 5V backup supply for SRAM or real-time clock during main power loss in portable medical devices. IC Role / Device Role / Timing Role: Micropower charge pump delivering stable 5V from depleted Li-ion cell (down to 2.7V). Use Value: Maintains data integrity during brownout with 6µA operating current and thermal robustness under sustained short conditions. |
| Application 3 | Application 4 |
Use Scenario: Local 3V-to-5V conversion for USB-peripheral interface logic in handheld PDAs and industrial handhelds. IC Role / Device Role / Timing Role: Compact, inductorless DC/DC booster replacing discrete charge pump solutions. Use Value: Reduces BOM count (only three capacitors needed) and board area vs. inductor-based converters, meeting strict size constraints. |
Use Scenario: Powering PCMCIA Type II card slot logic in legacy laptops and ruggedized field terminals. IC Role / Device Role / Timing Role: Regulated 5V source compliant with PCMCIA 2.1 specification for card initialization and operation. Use Value: Meets PCMCIA 5V ±5% tolerance and fast turn-on (<1ms) requirements using minimal external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1516CS8#PBF | Same 5V output, but supports 50mA at VIN ≥ 3V; higher ICC (12µA typ); no ultralow IQ mode. | Better for higher-current SIM or PCMCIA loads; lacks sub-1µA shutdown and 10µA efficiency optimization. | Select LTC1516CS8#PBF only if >20mA output is required and ultralow shutdown current is not critical. |
| LTC1517-5CS6#TRMPBF | SOT-23-6 package (no shutdown pin); fixed 5V output; 10mA max (VIN ≥ 2.7V); 8µA ICC. | Ultra-compact footprint for space-limited designs; no shutdown control or load disconnection capability. | Choose LTC1517-5CS6#TRMPBF only when board area is paramount and active shutdown is unnecessary. |
Compared with LTC1516CS8#PBF and LTC1517-5CS6#TRMPBF, the LTC1522CMS8#TRPBF uniquely balances 20mA capability, <1µA shutdown, and MSOP8 pin compatibility - making it optimal for battery-sensitive, space-constrained 5V rail generation where both efficiency and controllability matter.
Availability
LTC1522CMS8#TRPBF is available at Aetrix Electronics and suitable for GSM SIM interface supplies, Li-ion battery backup systems, and PCMCIA local 5V generation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1522CMS8#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 full product continuity, technical documentation, and manufacturing for legacy Linear power ICs including the LTC series.
The LTC1522CMS8#TRPBF belongs to Linear's micropower charge pump DC/DC converter family, engineered specifically for ultra-low-power, inductorless voltage boosting in portable and battery-backed applications.
FAQ
What is the maximum continuous output current supported by the LTC1522CMS8#TRPBF?
The LTC1522CMS8#TRPBF delivers up to 20mA continuous output current when input voltage is ≥3V, and up to 10mA when input voltage is between 2.7V and 3V. This rating assumes proper capacitor selection (0.22µF flying cap, 10µF input/output caps) and ambient temperature ≤70°C. Exceeding these limits may trigger thermal shutdown.
Does the LTC1522CMS8#TRPBF require an inductor in its application circuit?
No, the LTC1522CMS8#TRPBF is a switched-capacitor (charge pump) DC/DC converter and does not require any inductor. Its complete application circuit uses only three external capacitors: one 0.22µF flying capacitor and two 10µF bypass capacitors at VIN and VOUT - enabling compact, low-EMI designs.
How does the shutdown function of the LTC1522CMS8#TRPBF affect the output connection?
When the SHDN pin of the LTC1522CMS8#TRPBF is driven high, the device enters shutdown mode and actively disconnects VOUT from VIN. This prevents backfeed and eliminates load current draw from the input supply, resulting in <1µA total shutdown current - critical for zero-power standby states.
Can the LTC1522CMS8#TRPBF operate with input voltages below 2.7V?
No, the LTC1522CMS8#TRPBF has a specified minimum input voltage of 2.7V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.7V is not guaranteed and may result in failure to regulate, increased ripple, or inability to start up - especially with load currents above a few microamps.
Is the LTC1522CMS8#TRPBF pin-compatible with other members of the LTC15xx family?
Yes, the LTC1522CMS8#TRPBF is explicitly stated as pin-compatible with the LTC1516 in applications where VIN ≥ 2.7V and IOUT ≤ 20mA. Both share identical 8-pin MSOP and SO footprints and matching pin functions (VIN, VOUT, SHDN, GND, C+, C−, NC), enabling direct replacement in compatible designs.
LTC1522CMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC1522CMS8#TRPBF FAQ
1.How can I place an order for LTC1522CMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1522CMS8#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 LTC1522CMS8#TRPBF reliable?
The price and inventory of LTC1522CMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1522CMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1522CMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1522CMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1522CMS8#TRPBF?
LTC1522CMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1522CMS8#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 LTC1522CMS8#TRPBF?
For technical support, including LTC1522CMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1522CMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1522CMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1522CMS8#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 LTC1522CMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1522CMS8#TRPBF?
All LTC1522CMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1522CMS8#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 LTC1522CMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1522CMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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