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Analog Devices Inc. DC097A-B
- Part No.:
- DC097A-B
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC097A-B.pdf
- Description:
- EVAL BOARD FOR LT1307
- Quantity:
- Payment:
- Shipping:
Inventory:2,008
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Product details
Overview
DC097A-B from Linear Technology is a micropower, fixed-frequency 600kHz PWM DC/DC boost converter optimized for single-cell (1V–1.5V) battery input to regulated 3.3V or 5V output. It integrates an NPN power switch with 295mV VCE(SAT) at 500mA, low-battery detection (200mV threshold), and automatic Burst Mode operation (LT1307 variant) or continuous switching (LT1307B variant). It enables compact, high-efficiency power in glucose meters and GPS receivers.
For engineers reviewing the DC097A-B datasheet, DC097A-B pinout, DC097A-B application, or DC097A-B equivalent, key selection criteria include minimum input voltage (1V), quiescent current (50µA for LT1307 / 1mA for LT1307B), feedback reference (1.22V), switching frequency (600kHz ±50kHz), and low-battery detector interface compatibility with 200mV LBI threshold and open-collector LBO output.
Technical Context
The DC097A-B implements current-mode PWM control with a 600kHz oscillator and ramp compensation to prevent subharmonic oscillation above 50% duty cycle. Its error amplifier features 35µmhos transconductance and ≥35V/V gain, compensated externally via the VC pin using a series RC network (e.g., 100kΩ + 680pF).
Burst Mode operation (LT1307) uses hysteresis in comparator A1 to gate full circuit enablement at light loads (<100mA), reducing average quiescent current to 50µA while maintaining regulation; the LT1307B omits this hysteresis, enforcing continuous 600kHz switching and eliminating low-frequency output ripple at the cost of higher light-load IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1V to 5V - supports direct connection to single alkaline/NiMH cells (1.0–1.5V nominal) without pre-regulation |
| Switching Frequency | 550–750kHz (typ. 600kHz) - enables use of small 10µH surface-mount inductors and 10µF ceramic output capacitors |
| Feedback Reference | 1.22V ±20mV - sets output voltage via external resistor divider (e.g., 3.3V = 1.22V × (1 + R1/R2)) |
| Quiescent Current | 50µA (LT1307) / 1mA (LT1307B) - determines standby battery life in always-on portable medical devices |
| Low-Battery Threshold | 200mV ±10mV on LBI pin - triggers open-collector LBO output to signal end-of-life for 1.0–1.5V primary cells |
| Power Switch VCE(SAT) | 295mV at 500mA - limits conduction loss to <150mW at full load, enabling >85% efficiency at 75mA output |
| Shutdown Current | ≤3µA - ensures negligible drain during storage or system sleep modes |
Pinout & Package
DC097A-B is packaged in an 8-lead MSOP (MS8) with exposed pad for thermal enhancement. Pin assignments are identical across LT1307/LT1307B variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Compensation node for error amplifier | Connect external RC (e.g., 100kΩ + 680pF) to ground; controls loop stability and transient response |
| FB (Pin 2) | Feedback input | Senses output voltage divider; 1.22V reference sets regulation point; trace area must be minimized to reduce noise coupling |
| SHDN (Pin 3) | Enable/disable control | Drive ≥VIN to enable; ground to disable (≤3µA shutdown current); must never float |
| GND (Pin 4) | Power and signal reference | Direct connection to local ground plane required; separates power and analog return paths |
| SW (Pin 5) | Switch node | Connects to inductor/diode; high di/dt path - minimize trace length and area to limit EMI |
| VIN (Pin 6) | Main supply input | Requires 1µF ceramic bypass capacitor placed ≤5mm away; accepts 1V–5V input |
| LBI (Pin 7) | Low-battery detector input | 200mV threshold reference; voltage range limited to 0–700mV; bias current <30nA |
| LBO (Pin 8) | Low-battery open-collector output | Sinks 10µA max; requires external pull-up (e.g., 1MΩ) to monitor battery health |
Key Features
| Feature | Design Value |
|---|---|
| Single-cell start-up capability | Operates down to 0.92V input - enables reliable boot from depleted alkaline or NiMH cells |
| Integrated low-battery detector | 200mV precision threshold with ±10mV tolerance - eliminates need for external supervisor IC in portable diagnostics |
| High-frequency switching (600kHz) | Permits use of 10µH MLC inductors and 10µF ceramic output caps - reduces board area by >50% vs. 100kHz converters |
| Burst Mode (LT1307) / Continuous Mode (LT1307B) | Selectable light-load behavior: 50µA IQ with regulated output (Burst) or clean 600kHz ripple-free output (Continuous) |
| Low VCE(SAT) NPN switch | 295mV drop at 500mA - delivers 75mA @ 3.3V from 1.25V input with >87% measured efficiency |
Applications
| Patient-Worn Glucose Monitor | Handheld GPS Receiver |
|---|---|
Use Scenario: Battery-powered device measuring blood glucose every 5 minutes, transmitting data via BLE, requiring stable 3.3V rail for MCU and sensor. IC Role / Device Role / Timing Role: Primary boost regulator converting 1.2V–1.5V single AA/NiMH cell to regulated 3.3V output. Use Value: 50µA quiescent current (LT1307) extends battery life to >6 months; Burst Mode maintains regulation during 5-minute idle intervals without sacrificing accuracy. | Use Scenario: Portable outdoor navigation unit with LCD display, GPS baseband processor, and RF front-end operating from two AA cells. IC Role / Device Role / Timing Role: Dual-output power manager generating 3.3V for digital logic and 5V for analog RF section. Use Value: 600kHz switching allows compact 10µH inductor + 10µF ceramic cap solution; continuous mode (LT1307B) prevents low-frequency ripple from interfering with GPS signal acquisition. |
| Portable Diagnostic Instrument | Cordless Medical Sensor Node |
Use Scenario: Battery-operated handheld device performing rapid electrochemical assays with real-time display and USB charging. IC Role / Device Role / Timing Role: Main DC/DC converter supplying 3.3V to microcontroller, ADC, and OLED display from single-cell input. Use Value: Low-battery detector (LBI/LBO) provides precise end-of-life warning at 200mV - critical for clinical reliability and user safety compliance. | Use Scenario: Ultra-low-power wireless sensor node monitoring vital signs, sleeping >95% of time, waking only for scheduled BLE transmissions. IC Role / Device Role / Timing Role: Micropower boost regulator powering RF SoC and analog front-end from coin cell or thin-film battery. Use Value: 1V minimum input enables operation down to 0.92V - maximizes usable capacity of CR2032 or LiFePO₄ cells in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX756CPA+ | Fixed 5V output only; no adjustable FB pin; 1.2V min input; 100µA IQ | Lacks programmable output and low-battery detection; requires external supervisor for battery monitoring | Choose when fixed 5V output suffices and board space permits larger 330kΩ/100pF compensation network |
| TPS61200DRCR | Adjustable output (1.8–5.5V); 1.8V min input; 5.5µA IQ in shutdown; integrated soft-start | Cannot start from 1V input; lacks dedicated low-battery comparator; higher BOM cost | Prefer for multi-cell or Li-ion systems where 1.8V+ input is guaranteed and ultra-low shutdown IQ is critical |
Compared with MAX756CPA+ and TPS61200DRCR, DC097A-B uniquely supports true 1V start-up, integrated 200mV low-battery detection, and dual-mode (Burst/Continuous) operation - making it optimal for single-cell medical and GPS applications demanding both longevity and clean output.
Availability
DC097A-B is available at Aetrix Electronics and suitable for glucose meters, GPS receivers, portable diagnostic instruments, and cordless medical sensor nodes requiring stable component supply with long-term manufacturability.
Supply support for DC097A-B 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
Linear Technology Corporation (now part of Analog Devices) designs high-performance analog ICs for precision power, signal conditioning, and interface applications.
The LT1307/LT1307B product line was engineered specifically for ultra-low-voltage, micropower boost conversion in single-cell battery systems - prioritizing start-up margin, light-load efficiency, and integration of battery monitoring functions.
FAQ
What is the minimum input voltage required for DC097A-B to start switching?
DC097A-B starts switching at 0.92V under worst-case conditions (–40°C, industrial grade), with guaranteed operation from 1.0V at 25°C. This enables reliable boot from nearly depleted alkaline or NiMH cells, a key requirement for long-life portable medical devices where battery replacement is infrequent or inconvenient.
How does the Burst Mode operation in DC097A-B improve battery life?
DC097A-B (LT1307 variant) enters Burst Mode below ~100mA load, disabling most internal circuitry except the error amplifier and low-battery detector. This reduces total quiescent current to 50µA - extending battery life in intermittent-use devices like glucose monitors by up to 3× compared to continuous-switching alternatives such as the LT1307B variant.
Can DC097A-B generate both 3.3V and 5V outputs from the same design?
Yes - DC097A-B supports adjustable output via its FB pin. For 3.3V: use R1 = 1.02MΩ, R2 = 604kΩ. For 5V: use R1 = 1MΩ, R2 = 329kΩ. The same DC097A-B IC, inductor, and diode can be reused across both configurations with only resistor changes - simplifying BOM management and design reuse.
What is the purpose of the LBI and LBO pins on DC097A-B?
The LBI (Low-Battery Input) pin accepts a resistive divider from VIN to ground, comparing against an internal 200mV reference. When VIN drops below the threshold (e.g., ~1.0V for a 1.5V cell), the open-collector LBO (Low-Battery Output) pulls low, signaling end-of-life to the host MCU. This eliminates need for external voltage supervisors in space-constrained portable designs using DC097A-B.
Why is the VC pin critical for stable operation of DC097A-B?
The VC pin is the error amplifier output and must be externally compensated with a series RC network (e.g., 100kΩ + 680pF) to ground. Without proper compensation, DC097A-B exhibits excessive output ripple or oscillation under dynamic load - especially at 50mA+ loads. Empirical tuning of the RC values is required to achieve optimal transient response and phase margin for each specific application layout and component set.
DC097A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Up
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 5V
- Voltage - Input:
- -
- Regulator Topology:
- -
- Frequency - Switching:
- Boost
- Contents:
- 600kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- LT1307
DC097A-B FAQ
1.How can I place an order for DC097A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for DC097A-B 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 DC097A-B reliable?
The price and inventory of DC097A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC097A-B is usually 5 days.
3.What payment methods are accepted for DC097A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC097A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC097A-B?
DC097A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC097A-B 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 DC097A-B?
For technical support, including DC097A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC097A-B requirements.
6.How does Aetrix verify that DC097A-B is sourced from the original manufacturer or authorized distributors?
All DC097A-B 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 DC097A-B meets industry standards.
7.What is the process for return or replacement of DC097A-B?
All DC097A-B units undergo pre-shipment inspection (PSI). If there is an issue with DC097A-B, 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 DC097A-B part is unused and in its original packaging.
Return procedure for DC097A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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