1 Features
1• High-Efficiency Synchronous Step-Down
Converter With up to 95% Efficiency
• 3.1-V to 17-V Operating Input Voltage Range
• Adjustable Output Voltage Range: 1.2 V to 16 V
• Fixed Output Voltage Options Available in
3.3 V and 5 V
• Synchronizable to External Clock: Up to 1.4 MHz
• Up to 1.5-A Output Current
• High Efficiency Over a Wide Load-Current
Range Due to PFM/PWM Operation Mode
• 100% Maximum Duty Cycle for Lowest Dropout
• 20-μA Quiescent Current (Typical)
• Overtemperature and Overcurrent Protected
• Available in 16-Pin VQFN Package

2 Applications
• Point-of-Load Regulation From 12-V Buses
• Organizers, PDAs, and Handheld PCs
• Handheld Scanners

3 Description
The TPS6211x devices are a family of low-noise
synchronous step-down DC-DC converters that are
ideally suited for systems powered from a 2- to 4-cell
Li-ion battery or from a 12-V or 15-V rail.
The TPS6211x devices are synchronous pulse width
modulation (PWM) converters with integrated N- and
P-channel power MOSFET switches. Synchronous
rectification is used to increase efficiency and to
reduce external component count. To achieve highest
efficiency over a wide load-current range, the
converter enters a power-saving, pulse frequency
modulation (PFM) mode at light load currents.
Operating frequency is typically 1 MHz, allowing the
use of small inductor and capacitor values. The
device can be synchronized to an external clock
signal in the range of 0.8 MHz to 1.4 MHz. For low-
noise operation, the converter can be operated in
PWM-only mode. In shutdown mode, the current
consumption is reduced to less than 2 μA. The
TPS6211x family of devices are available in the 16- pin (RSA) VQFN package, and operate over a free-
air temperature range of –40°C to 85°C.