DC/DC芯片版图分层次拍照，金属、poly，等等(很详细)

DC/DC芯片版图分层次拍照，金属、poly，等等，很详细，没见过的同学可以下载看看

TI的降压dcdc，比较老的一款芯片，图片不是很清楚，做这方面的下下来看看无妨！ TPS62040 FEATURES Up to 95% Conversion Efficiency Typical Quiescent Current: 18 μA Load Current: 1.2 A Operating Input Voltage Range: 2.5 V to 6.0 V Switching Frequency: 1.25 MHz Adjustable and Fixed Output Voltage Power Save Mode Operation at Light load Currents 100% Duty Cycle for Lowest Dropout Internal Softstart Dynamic Output Voltage Positioning Thermal Shutdown Short-Circuit Protection 10 Pin MSOP PowerPad Package 10 Pin QFN 3 X 3 mm Package APPLICATIONS PDA, Pocket PC and Smart Phones USB Powered Modems CPUs and DSPs PC Cards and Notebooks xDSL Applications Standard 5-V to 3.3-V Conversion DESCRIPTION The TPS6204x family of devices are high efficiency synchronous step-down dc-dc converters optimized for battery powered portable applications. The devices are ideal for portable applications powered by a single Li-Ion battery cell or by 3-cell NiMH/NiCd batteries. With an output voltage range from 6.0 V down to 0.7 V, the devices support low voltage DSPs and processors in PDAs, pocket PCs, as well as notebooks and subnotebook computers. The TPS6204x operates at a fixed switching frequency of 1.25 MHz and enters the power save mode operation at light load currents to maintain high efficiency over the entire load current range. For low noise applications, the devices can be forced into fixed frequency PWM mode by pulling the MODE pin high. The TPS6204x supports up to 1.2-A load current.

TI的降压dcdc，比较老的一款芯片，图片不是很清楚，做这方面的下下来看看无妨！

TPS62040
FEATURES
Up to 95% Conversion Efficiency
Typical Quiescent Current: 18 μA
Load Current: 1.2 A
Operating Input Voltage Range: 2.5 V to 6.0 V
Switching Frequency: 1.25 MHz
Adjustable and Fixed Output Voltage
Power Save Mode Operation at Light load Currents
100% Duty Cycle for Lowest Dropout
Internal Softstart
Dynamic Output Voltage Positioning
Thermal Shutdown
Short-Circuit Protection
10 Pin MSOP PowerPad Package
10 Pin QFN 3 X 3 mm Package
APPLICATIONS
PDA, Pocket PC and Smart Phones
USB Powered Modems
CPUs and DSPs
PC Cards and Notebooks
xDSL Applications
Standard 5-V to 3.3-V Conversion
DESCRIPTION
The TPS6204x family of devices are high efficiency
synchronous step-down dc-dc converters optimized for
battery powered portable applications. The devices are
ideal for portable applications powered by a single Li-Ion
battery cell or by 3-cell NiMH/NiCd batteries. With an
output voltage range from 6.0 V down to 0.7 V, the devices
support low voltage DSPs and processors in PDAs,
pocket PCs, as well as notebooks and subnotebook
computers. The TPS6204x operates at a fixed switching
frequency of 1.25 MHz and enters the power save mode
operation at light load currents to maintain high efficiency
over the entire load current range. For low noise
applications, the devices can be forced into fixed
frequency PWM mode by pulling the MODE pin high. The
TPS6204x supports up to 1.2-A load current