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Analog Devices Inc. LTC3306CACBZ-1.2-R7
- Part No.:
- LTC3306CACBZ-1.2-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFBGA, WLCSP
- Datasheet:
-
LTC3306CACBZ-1.2-R7.pdf
- Description:
- IC REG BUCK 1.2V 1.75A 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
LTC3306CACBZ-1.2-R7 from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering 1.75A output current from 2.25V–5.5V input, with fixed 1.2V output, 2MHz switching frequency, and forced continuous mode operation. It integrates 30mΩ NMOS and 100mΩ PMOS power switches, achieves ±1.0% VOUT accuracy, and targets FPGA core supplies requiring compact, low-noise regulation.
For engineers reviewing the LTC3306CACBZ-1.2-R7 datasheet, LTC3306CACBZ-1.2-R7 pinout, LTC3306CACBZ-1.2-R7 application, or LTC3306CACBZ-1.2-R7 equivalent, this page provides verified package mapping, validated pin functions, confirmed operational mode (FCM), real-world efficiency curves at 1.2V/1.75A, and two manufacturer-confirmed alternative parts for design flexibility.
Technical Context
The LTC3306CACBZ-1.2-R7 uses constant-frequency peak current mode control with 22ns minimum on-time to maintain regulation under fast load transients while operating in forced continuous mode-ensuring consistent 2MHz switching and low output voltage ripple. Its internal compensation eliminates external loop components.
This variant features fixed 1.2V output (no FB pin), precision 400mV enable threshold with 50mV hysteresis, PGOOD open-drain output with 97–99% rising threshold and 100μs delay, and integrated protections including thermal shutdown (160°C trip), output overvoltage lockout (107–114% VOUT), and short-circuit recovery via soft-start reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1.0% - ensures stable core rail for FPGA/ASIC without external feedback resistors. |
| Max Output Current | 1.75A average - supports high-current digital loads without external current sensing. |
| Input Voltage Range | 2.25V to 5.5V - compatible with single-cell Li-ion, 3.3V, and 5V intermediate bus architectures. |
| Switching Frequency | 2.0MHz typical - enables use of sub-1μH inductors and reduces solution size to ~9mm². |
| Top/Bottom RDS(ON) | 30mΩ NMOS / 100mΩ PMOS - minimizes conduction loss at 1.75A, enabling >90% efficiency at mid-load. |
| Enable Threshold | 400mV rising with 50mV hysteresis - allows precise power-up sequencing from upstream regulators. |
| PGOOD Threshold | Rising at 98% VOUT (1.176V), falling at 97% VOUT (1.164V) - provides reliable system-level power monitoring. |
| Thermal Shutdown | 160°C typical trip, 155°C hysteresis - protects die during sustained overload without latch-up. |
Pinout & Package
The LTC3306CACBZ-1.2-R7 is housed in a 6-pin, 1.6mm × 1mm, 0.5mm pitch WLCSP flip-chip package with solder bumps on bottom side. Thermal performance: θJA = 60°C/W, θJC = 1.5°C/W, TJMAX = 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD (A1) | Open-drain power-good indicator | Pulled low if VOUT < 97% or > 110% nominal, or during shutdown/UVLO/thermal fault; requires external pull-up. |
| GND (A2) | Power ground and remote sense return | Return path for bottom switch and reference point for output voltage sensing; must connect input/output caps nearby. |
| EN (B1) | Enable control with precision threshold | Active-high; device enabled when voltage ≥ 400mV; 50mV hysteresis prevents chatter near threshold. |
| SW (B2) | Switch node | Connects directly to inductor; carries high di/dt; requires short, wide PCB trace to minimize EMI and voltage spikes. |
| VOUT (C1) | Fixed-output regulated voltage pin | Delivers 1.2V; not high-impedance-connect low-ESR ceramic capacitor (e.g., 22μF X5R) directly to GND. |
| VIN (C2) | Main input supply | Supplies internal circuitry and top switch; bypass with 10μF ceramic capacitor close to pin to suppress noise. |
Key Features
| Feature | Design Value |
|---|---|
| Forced Continuous Mode (FCM) | Ensures fixed 2MHz operation and minimal output ripple-ideal for noise-sensitive FPGA/ASIC core rails. |
| Internal Compensation | Eliminates need for external compensation network, reducing BOM count and layout sensitivity. |
| 100% Duty Cycle Capability | Enables ultra-low dropout operation down to VIN ≈ VOUT + ILOAD × RDS(ON)_PMOS, extending battery runtime. |
| Low Shutdown Current | 1μA max - preserves battery life in always-on systems with infrequent wake cycles. |
| Robust Fault Protection | Integrated OVP (107–114% VOUT), short-circuit recovery via soft-start reset, and thermal shutdown with hysteresis. |
| Tiny 9mm² Total Solution Size | Uses only one 1μH inductor and two small ceramics (10μF/22μF); fits in space-constrained portable designs. |
Applications
| FPGA Core Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers 28nm/16nm FPGA core logic requiring tightly regulated 1.2V at up to 1.75A with minimal voltage droop during burst activity. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing clean, low-noise core rail with fast transient response. Use Value: 22ns minimum on-time and 2MHz switching enable sub-100ns load-step recovery; FCM ensures predictable ripple for timing-critical logic. |
Use Scenario: Supplies isolated I/O channel ASICs in DIN-rail mounted programmable logic controllers operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Point-of-load regulator converting 5V backplane to 1.2V ASIC core, with thermal protection for sealed enclosures. Use Value: 125°C junction rating and robust OVP/short-circuit recovery ensure reliability in unventilated industrial environments. |
| Medical Imaging Sensor Interface | Automotive ADAS Camera Module |
Use Scenario: Powers high-speed ADC/DAC interface ASICs in portable ultrasound devices where EMI must be minimized near analog signal paths. IC Role / Device Role / Timing Role: Low-noise, fixed-output buck supplying sensor front-end with <10mVpp ripple at 1.2V. Use Value: Forced continuous mode eliminates burst-mode frequency modulation, preventing interference with sensitive analog acquisition. |
Use Scenario: Supplies image signal processor (ISP) core in compact rear-view camera modules powered from 5V automotive bus. IC Role / Device Role / Timing Role: Compact POL regulator meeting AEC-Q200 stress requirements for vibration/temperature cycling. Use Value: 1.6mm × 1mm WLCSP footprint saves board area; 2.25V min VIN supports cold-crank conditions down to 2.5V battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6286418RTER | 1.8V fixed output, 2.5MHz, 2A max, 1.45mm × 1.45mm DSBGA | Higher output voltage; unsuitable for 1.2V FPGA cores without redesign. | Select only if target rail is 1.8V and higher switching frequency is required for smaller inductors. |
| MP2143GJ-Z | Adjustable output (0.6–5.5V), 2MHz, 1.5A, 2mm × 2mm QFN-8 | Requires external feedback resistors; larger package; lower current rating. | Choose when output voltage flexibility or thermal pad accessibility is prioritized over size and current capability. |
Compared with LTC3306CACBZ-1.2-R7, TPS6286418RTER offers higher frequency but mismatches the 1.2V requirement, while MP2143GJ-Z trades integration and current capacity for configurability and thermal management-neither is pin-compatible, and both require PCB layout changes.
Availability
LTC3306CACBZ-1.2-R7 is available at Aetrix Electronics and suitable for FPGA core supplies, industrial PLC I/O modules, medical imaging sensor interfaces, and automotive ADAS camera modules requiring stable component supply across extended temperature ranges.
Supply support for LTC3306CACBZ-1.2-R7 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets.
The LTC3306 product line delivers ultra-compact, high-efficiency synchronous buck regulators for space-constrained, noise-sensitive digital loads-designed specifically for FPGA, ASIC, and microprocessor core rail applications.
FAQ
What is the operating temperature range for the LTC3306CACBZ-1.2-R7?
The LTC3306CACBZ-1.2-R7 is rated for an operating junction temperature range of –40°C to +125°C. This grade (C-grade) is guaranteed over the full range via design correlation and statistical process controls, making it suitable for industrial and automotive under-hood applications where ambient temperatures exceed 85°C.
Does the LTC3306CACBZ-1.2-R7 require external compensation components?
No, the LTC3306CACBZ-1.2-R7 features internal compensation optimized for stability with standard 1μH inductors and 22μF ceramic output capacitors. No external RC networks or feedforward capacitors are needed-reducing bill-of-materials count and layout complexity.
How does the PGOOD function behave during startup and fault conditions for the LTC3306CACBZ-1.2-R7?
During startup, PGOOD remains low until VOUT reaches 98% of 1.2V (1.176V) and stays high for ≥100μs. It pulls low during EN deactivation, VIN UVLO (<2.25V), VOUT overvoltage (>1.32V), or thermal shutdown-providing unambiguous system-level power status for host controllers.
Can the LTC3306CACBZ-1.2-R7 operate with input voltages below 2.25V?
No-the absolute minimum input voltage is 2.25V per datasheet specifications. Below this, undervoltage lockout engages, disabling switching and pulling PGOOD low. Attempting operation at lower VIN risks regulation failure and potential damage due to insufficient gate drive for internal MOSFETs.
What is the purpose of the 100% duty cycle capability in the LTC3306CACBZ-1.2-R7?
The 100% duty cycle capability allows the LTC3306CACBZ-1.2-R7 to sustain regulation as VIN approaches 1.2V-minimizing dropout voltage to only ILOAD × RDS(ON)_PMOS (≈175mV at 1.75A). This extends usable battery life in Li-ion-powered portable equipment during deep discharge.
LTC3306CACBZ-1.2-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.75A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (1.64x1.03)
LTC3306CACBZ-1.2-R7 FAQ
1.How can I place an order for LTC3306CACBZ-1.2-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3306CACBZ-1.2-R7 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 LTC3306CACBZ-1.2-R7 reliable?
The price and inventory of LTC3306CACBZ-1.2-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3306CACBZ-1.2-R7 is usually 5 days.
3.What payment methods are accepted for LTC3306CACBZ-1.2-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3306CACBZ-1.2-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3306CACBZ-1.2-R7?
LTC3306CACBZ-1.2-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3306CACBZ-1.2-R7 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 LTC3306CACBZ-1.2-R7?
For technical support, including LTC3306CACBZ-1.2-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3306CACBZ-1.2-R7 requirements.
6.How does Aetrix verify that LTC3306CACBZ-1.2-R7 is sourced from the original manufacturer or authorized distributors?
All LTC3306CACBZ-1.2-R7 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 LTC3306CACBZ-1.2-R7 meets industry standards.
7.What is the process for return or replacement of LTC3306CACBZ-1.2-R7?
All LTC3306CACBZ-1.2-R7 units undergo pre-shipment inspection (PSI). If there is an issue with LTC3306CACBZ-1.2-R7, 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 LTC3306CACBZ-1.2-R7 part is unused and in its original packaging.
Return procedure for LTC3306CACBZ-1.2-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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