Texas Instruments LM3697YFQR
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 12-WFBGA, DSBGA |
| Frequency | 500kHz, 1MHz |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Type | DC DC Regulator |
| Number of Outputs | 3 |
| Voltage - Output | 40V |
| Applications | Backlight |
| Supplier Device Package | 12-DSBGA (1.64x1.24) |
| Dimming | - |
| Topology | Step-Up (Boost) |
| Current - Output / Channel | 30mA |
| Internal Switch(s) | Yes |
| Voltage - Supply (Max) | 5.5V |
| Voltage - Supply (Min) | 2.7V |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | LM3697 |
| REACH Status | REACH Unaffected |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
LM3697YFQR Dual Buck Converter, Step-Down DC-DC Converter
The LM3697YFQR from Texas Instruments is a high-efficiency, step-down DC-DC voltage converter designed specifically to provide a regulated power supply for low-voltage core logic in space-constrained, battery-powered portable devices. This compact device integrates two independent, high-frequency synchronous buck regulators in a single ultra-small package, delivering a highly efficient and minimal footprint power solution. Optimized for applications with stringent power consumption requirements, it features a low 35µA quiescent current per regulator and an automatic Power Save Mode at light loads, significantly extending battery life in products like smartphones, tablets, and portable media players.
Key Electrical Characteristics
The LM3697 excels with its impressive efficiency and flexible performance. Each of its two regulators can deliver up to 300mA of output current from an input voltage range of 2.5 V to 5.5 V, supporting single-cell Li-Ion batteries and other common sources. It operates at a high fixed switching frequency of 2.25 MHz (or 4.5 MHz in optional spread-spectrum mode for reduced EMI), allowing for the use of tiny, low-profile inductors and capacitors. Key specs include a low 65mVp-p output ripple, high efficiency up to 95%, and a 1.6% output voltage accuracy, ensuring a stable and clean power rail for sensitive system-on-chip (SoC) cores and application processors.
Application Scenarios
The primary application of the LM3697YFQR is powering the core logic and I/O voltages in advanced portable electronics. It is an ideal choice for smartphones, tablets, digital cameras, portable GPS units, and handheld medical instruments. Its dual-regulator design allows it to independently power an application processor core and its memory or other peripherals, simplifying power architecture. The extremely small solution size and high efficiency make it indispensable for any design where maximizing battery run-time and minimizing PCB area are critical design constraints.
Alternative Portable Device Power Management Parts
● TPS62740: A high-efficiency, step-down converter from TI optimized for ultra-low Iq consumption in always-on applications like wearables.
● MAX77650: A highly integrated PMIC from Analog Devices that includes buck regulators, LDOs, and a fuel gauge, targeting sophisticated portable designs.
● AP3602: A dual-channel, high-frequency step-down converter from Diodes Incorporated offering a similar current output in a compact package.
●MP3632: A monolithic, dual-step-down switcher from MPS with high efficiency and a wide input voltage range for various portable equipment.
