My Inquiry
My Account
Analog Devices Inc. LTC1700EMS#PBF
- Part No.:
- LTC1700EMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1700EMS#PBF.pdf
- Description:
- IC REG CTRLR BOOST 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:144
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1700EMS#PBF from Analog Devices (formerly Linear Technology) is a current-mode synchronous step-up DC/DC controller that drives external N-channel and P-channel MOSFETs. It operates at 530 kHz nominal frequency, achieves up to 95% efficiency, supports input voltages as low as 0.9 V, and delivers ±1.5% output voltage accuracy - enabling compact, high-efficiency boost converters in battery-powered RF systems.
For engineers reviewing the LTC1700EMS#PBF datasheet, LTC1700EMS#PBF pinout, LTC1700EMS#PBF application, or LTC1700EMS#PBF equivalent, key selection considerations include its No RSENSE™ current sensing, OPTI-LOOP® compensation, Burst Mode® operation for light-load efficiency, 10-lead MSOP package, and synchronization range of 400–750 kHz.
Technical Context
The LTC1700EMS#PBF implements constant-frequency PWM control with current-mode architecture, using VDS sensing across the main N-channel MOSFET to eliminate external sense resistors. Its error amplifier output (ITH pin) directly controls peak inductor current, while slope compensation activates above 5% duty cycle to prevent subharmonic oscillation.
It integrates dual gate drivers (TG and BG) with 60–100 ns transition times, 90% maximum duty cycle limiting, and overvoltage protection that disables both external MOSFETs when output exceeds +5% of regulation. Start-up mode operates at ~210 kHz below 2.3 V output, transitioning automatically to full control loop operation once VOUT exceeds threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Synchronous step-up (boost) DC/DC controller - requires external N- and P-channel MOSFETs |
| Switching Frequency | 530 kHz nominal; synchronizable from 400 kHz to 750 kHz - enables small inductors & capacitors |
| Min Start-Up Voltage | 0.9 V - supports single-cell Li-ion or NiMH battery start-up without auxiliary supply |
| Output Voltage Accuracy | ±1.5% - ensures stable regulation across line, load, and temperature for precision analog rails |
| Quiescent Current | 200 µA in normal operation - minimizes standby power loss in portable systems |
| Shutdown Current | 10 µA - enables ultra-low-power system sleep states |
| Current Sensing Method | No RSENSE™ VDS sensing - eliminates sense resistor losses and PCB area, preserving high efficiency at heavy loads |
| Package | 10-lead MSOP - surface-mount, thermally enhanced package with θJA = 150°C/W |
Pinout & Package
Package: 10-lead plastic MSOP (3 mm × 3 mm), exposed pad for thermal enhancement, rated for –40°C to 85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SGND (1) | Small-signal ground reference | Must be routed separately from PGND to minimize noise coupling into feedback path |
| ITH (2) | Error amplifier output / current limit control | Voltage sets peak inductor current; used for OPTI-LOOP® compensation network |
| VFB (3) | Feedback input | Monitors resistive divider output; regulated to 1.205 V reference for precise output setting |
| RUN/SS (4) | Soft-start and enable control | Pulling below 1.08 V shuts down device; external capacitor sets ramp time (~0.45 s/µF) |
| SYNC/MODE (5) | Frequency sync and Burst Mode control | ≥1.2 V enables Burst Mode; external CMOS clock (400–750 kHz) forces sync and disables Burst Mode |
| TG (6) | Top gate driver output | Drives P-channel synchronous rectifier with 0–VOUT swing; 1 A peak drive capability |
| VOUT (7) | Output supply and current reversal comparator input | Provides bias for internal circuitry and serves as reference for current reversal detection |
| BG (8) | Bottom gate driver output | Drives N-channel main switch with 0–VOUT swing; complements TG with controlled dead time |
| PGND (9) | Power ground for gate drivers | Connects to cathode of output capacitor and source of N-MOSFET; critical for accurate VDS sensing |
| SW (10) | Switch node connection | Inputs to VDS sense amp and current reversal comparator; connects to drain of main N-MOSFET |
Key Features
| Feature | Design Value |
|---|---|
| No RSENSE™ current sensing | Eliminates power loss and board space of external sense resistor while maintaining >95% efficiency at full load |
| OPTI-LOOP® compensation | Enables stable loop response with minimal output capacitance - reduces need for large bulk capacitors |
| Selectable Burst Mode® operation | Extends light-load efficiency by disabling switching until output droop triggers resumption - lowers average IQ to ~179 µA |
| 530 kHz fixed-frequency PWM | Allows use of compact 1.8 µH inductors and ceramic output caps - avoids audible noise and simplifies EMI filtering |
| 0.9 V minimum start-up voltage | Enables direct start from depleted single-cell batteries - no auxiliary LDO or charge pump required |
| Integrated overvoltage protection | Shuts off both external MOSFETs if output exceeds +5% of setpoint - prevents damage to downstream 3.3 V or 5 V ICs |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Boosting 3.3 V rail from 2.7–4.2 V Li-ion battery to power RF power amplifiers and transceivers. IC Role / Device Role / Timing Role: Synchronous step-up controller managing dynamic load transients during TX bursts. Use Value: Burst Mode® maintains >85% efficiency at 10 mA idle current while delivering 2 A peak during transmission. | Use Scenario: Generating stable 5 V supply from 3.3 V system rail for USB interface and baseband processor I/O. IC Role / Device Role / Timing Role: High-frequency boost controller enabling compact layout with 1.8 µH inductor and 330 µF POSCAP output cap. Use Value: 530 kHz operation minimizes EMI in sensitive RF bands; ±1.5% accuracy ensures reliable USB enumeration. |
| RF Communications Equipment | Battery-Powered Test Instruments |
Use Scenario: Providing clean 3.3 V or 5 V bias to low-noise amplifiers (LNAs) and mixers in handheld spectrum analyzers. IC Role / Device Role / Timing Role: Low-noise, current-mode controller with OPTI-LOOP® compensation stabilizing output under fast load steps. Use Value: 200 µA quiescent current extends battery life; 90% duty cycle limit prevents inductor saturation during overload. | Use Scenario: Powering precision ADC references and op-amp signal chains from 2-cell alkaline or LiFePO4 sources. IC Role / Device Role / Timing Role: Step-up controller with 0.9 V start-up and ±1.5% regulation supporting metrology-grade accuracy. Use Value: No RSENSE™ sensing avoids resistor TCR drift; VFB reference stability <±10 ppm/°C ensures measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-up controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3400EMS#PBF | Higher 1.5 MHz switching frequency; integrated MOSFETs; lower 0.6 V start-up voltage; no SYNC pin | Targets ultra-compact footprint where external FETs are undesirable; less suitable for high-current (>1.5 A) or high-voltage (>5.5 V) designs | Select LTC3400EMS#PBF only when board space is critical and output current ≤1.2 A; retains same MSOP-10 package but lacks synchronization |
| TPS61088RHLR | Integrated 12-A switch; 2.7–12 V input; 4.5–20 V output; no VDS sensing - uses current-sense resistor | Designed for higher-power industrial and display applications; requires external sense resistor and larger inductor | Choose TPS61088RHLR for >2 A continuous output or >5.5 V output; accept added resistor loss and layout complexity for integration benefit |
Compared with LTC3400EMS#PBF and TPS61088RHLR, the LTC1700EMS#PBF uniquely balances external FET flexibility, No RSENSE™ efficiency, and synchronization capability - making it optimal for mid-power RF and telecom boost stages requiring design scalability and EMI control.
Availability
LTC1700EMS#PBF is available at Aetrix Electronics and suitable for cellular telephony, wireless modems, RF communications equipment, battery-powered instrumentation, and telecom/network systems requiring stable component supply and long-term manufacturability.
Supply support for LTC1700EMS#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC1700EMS#PBF belongs to Linear's legacy high-efficiency DC/DC controller family, designed specifically for battery-powered RF and portable systems demanding wide-input-range, low-quiescent-current, and synchronization-capable boost conversion.
FAQ
What is the minimum input voltage required for the LTC1700EMS#PBF to start switching?
The LTC1700EMS#PBF features a dedicated start-up circuit that activates at input voltages as low as 0.9 V. Below 2.3 V output, it operates in start-up mode using an internal 210 kHz oscillator and a 60 mA current limit. Full regulation begins once VOUT exceeds 2.3 V and the main control loop powers up. This allows reliable boot from deeply discharged single-cell batteries without auxiliary circuitry.
How does the LTC1700EMS#PBF achieve current sensing without a sense resistor?
The LTC1700EMS#PBF uses Linear's patented No RSENSE™ technique, measuring the VDS voltage drop across the conducting N-channel main MOSFET to derive inductor current. This eliminates power loss and PCB area associated with discrete sense resistors while maintaining high efficiency across load range. The maximum sensed voltage is internally limited to 78 mV to protect against overcurrent.
Can the LTC1700EMS#PBF be synchronized to an external clock, and what is the valid frequency range?
Yes, the LTC1700EMS#PBF can be synchronized via its SYNC/MODE pin to an external CMOS-compatible clock signal between 400 kHz and 750 kHz. During synchronization, Burst Mode® operation is automatically disabled to ensure deterministic timing. Attempting to synchronize outside this range may cause abnormal behavior or loss of regulation, so strict adherence to the 400–750 kHz window is required.
What is the purpose of the ITH pin on the LTC1700EMS#PBF, and how is it used in compensation?
The ITH pin on the LTC1700EMS#PBF is the output of the internal error amplifier and directly controls peak inductor current. It serves as the control node for OPTI-LOOP® compensation - an RC network from ITH to SGND sets loop dynamics. Unlike traditional Type II/III compensators, OPTI-LOOP® allows stable operation with widely varying output capacitance values, simplifying design across different capacitor technologies and ESR ranges.
Does the LTC1700EMS#PBF provide overvoltage protection, and how does it behave during fault conditions?
Yes, the LTC1700EMS#PBF includes output overvoltage protection that trips when VOUT exceeds approximately +5% of the regulated setpoint (i.e., ~2.5–4.8% above nominal VFB). Upon detection, both external MOSFETs are immediately disabled and held off until the fault clears. This protects downstream 3.3 V or 5 V logic and analog components from destructive overvoltage events caused by feedback divider failure or load disconnection.
LTC1700EMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 0.9V ~ 6V
- Frequency - Switching:
- 530kHz
- Duty Cycle (Max):
- 88%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Soft Start
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC1700EMS#PBF FAQ
1.How can I place an order for LTC1700EMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1700EMS#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 LTC1700EMS#PBF reliable?
The price and inventory of LTC1700EMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1700EMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC1700EMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1700EMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1700EMS#PBF?
LTC1700EMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1700EMS#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 LTC1700EMS#PBF?
For technical support, including LTC1700EMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1700EMS#PBF requirements.
6.How does Aetrix verify that LTC1700EMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1700EMS#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 LTC1700EMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC1700EMS#PBF?
All LTC1700EMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1700EMS#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 LTC1700EMS#PBF part is unused and in its original packaging.
Return procedure for LTC1700EMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1700EMS#PBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
