VIP-REG1850
This Via-IP™ (VIP) configurable block is a Via-Only™ soft-IP circuit that can be created on a range of Triad Semiconductor via configurable arrays (VCAs) by a single mask layer Via-Only change.
The VIP-REG1850 buck converter uses PFM/PWM control architecture to provide improved efficiency across operating load current range. The 2.7V to 5.5V input voltage range makes the VIP-REG1850 ideally suited for single Li-Ion battery-powered applications.
The output voltage can be lowered by an external pin (LP) that lowers the output voltage for a low power system mode. Supply current is also reduced during this condition to reduce power consumption. In addition, an input control signal (MODE) can place the converter in a fixed PWM mode or PFM/PWM mode as needed by the system.
The use of small surface mount inductors and capacitors are achieved with a nominal switching frequency of 2.25MHz. The VIP-REG1850 is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.
Typical Application
Recommended Operating Conditions
Over operating free-air temperature range (unless otherwise noted)
| Symbol | Description | Min | Typ | Max | Unit |
|---|
| Vin | Input Supply Voltage | 2.7 | | 5.5 | V |
| Vout | Output Voltage, Normal Operation Output Voltage, Low Power Mode | | 1.8 1.2 | | V |
| TA | Operating Ambient Temperature | -40 | | 85 | ˚C |
| TJ | Operating Junction Temperature | -40 | | 125 | ˚C |
Electrical Characteristics
VIN=3.6V, VOUT=1.8V, L=2.2μH, COUT=10μF, TA=–40°C to 85°C typical values are at TA=25°C (unless otherwise noted)
| Symbol | Description | Min | Typ | Max | Unit |
|---|
| Vin | Input Voltage Range | 2.7 | | 5.5 | V |
| Iqq | Quiescent Operating Current Normal Operation Low Power Operation | | 40 15 | | μA |
| Vout | Output Voltage, Normal Operation Output Voltage, Low Power Mode | 1.71 1.14 | 1.8 1.2 | 1.89 1.26 | V |
| Vout_tol | Vout Regulation Tolerance | -5 | | +5 | % |
| Vline_reg | | | 1 | | % |
| Vload_reg | | | 1 | | mV/mA |
| Fosc | PWM Switching Frequency | | 2.25 | | MHz |
| Iload | Maximum Load Current | | | 500 | mA |
| Ictl_xtn | Load current to transition between PFM and PWM modes | | 80 | | mA |
| Ilim | Current Limit | 650 | | | mA |
| Rdson | High Side Internal FET On Resistance Tjmax=85˚C Low Side Internal FET On Resistance Tjmax=85˚C | | 0.675 0.380 | | Ω |
Simplified Functional Block Diagram
Circuit Operation Descriptions
The buck converter is implemented with several features that allow the user to optimize the performance based on the system implementation. These control signals are described below in more details.
Enabling/Disabling Control
The EN input pin controls the enabling and disabling of the Buck Converter. This input pin can be automatically enabled as VIN powers up by connecting an external pull-up resistor to VIN. Else it can be toggled by a system signal as needed to conserve power when the converter is not needed.
Low Power Operational Mode
The LP pin powers the user a way to place the converter into a low power mode of operation. In this mode the Vout value is reduced and the internal bias currents are reduced. This allows minimal power consumption as dictated by the system mode.
Control Architecture
The MODE pin allows the user to control the operational mode of the converter to optimize system performance. The two operating modes are a fixed PWM operation and a PFM/PWM operation mode to optimize efficiency.
Company Information
Triad Semiconductor Inc. is the industry’s leading supplier of configurable mixed-signal ASICs. A privately held fabless semiconductor company with headquarters in Winston-Salem, North Carolina, Triad Semiconductor develops and produces configurable mixed-signal ASICs for a variety of market applications including consumer, industrial, automotive and military.
The company’s groundbreaking via-configurable array (VCA) technology delivers mixed-signal ASICs with silicon-proven analog and digital functions more quickly and at a lower cost than traditional full-custom development models. Triad’s single-mask, Via-Only™ routing cuts engineering effort and fabrication time, resulting in fast-turn prototypes and low cost silicon solutions.
Triad’s Fast Full-CustomTM (FFC) approach can take a customer from initial prototypes to high volume production with a low cost silicon solution in a fraction of the standard industry model development cycle. In addition, the FFC development is the lowest risk approach to high volume production since it is based on a proven Via-Configurable Array to implement customer’s system requirements.
For more information, please visit www.triadsemi.com or call (336) 774-2150.
VCA Technology Catalog
To review Triad’s VCA Catalog offering, please visit the link below for current VCA Platforms that can be used to implement your feature set.
Catalog Website: http://www.triadsemi.com/services/product-catalog/