A7116
AiT Semiconductor Inc.
www.ait-ic.com
DC-DC CONVERTER/ BUCK (STEP-DOWN)
1.5MHz, 700mA SYNCHRONOUS WITH LOW QUIESCENT CURRENT
DESCRIPTION
The A7116 is
synchronous buck regulator using a constant
frequency, current mode architecture.
FEATURES
a
high efficiency monolithic
High Efficiency: Up to 96%
1.5MHz Constant Switching Frequency
700mA Output Current at VIN=3.6V
Integrated Main switch and synchronous rectifier.
No Schottky Diode Required
The A7116 is available in an adjustable version and
fixed output voltages, such as 1.2V, 1.8V, etc.
Supply current with no load is 40uA and drops to
<1uA in shutdown. The 2.5V to 6.5V input voltage
range makes the A7116 ideally suited for single
Li-Ion, two to four AA battery-powered applications.
100% duty cycle provides low dropout operation,
extending battery life in portable systems. In power
saving mode, 40uA quiescent current is very
suitable for DSP/MCU in standby operation; and in
PWM mode, low output ripple voltage is good
enough for noise sensitive applications. The two
modes can be automatically switched according to
the load current.
2.5V to 6.5V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Quiescent Current: 40µA(input < 4.2V)
Slope Compensated Current Mode Control for
Excellent Line and Load Transient Response
Short Circuit Protection
<1uA Shutdown Current
Available in SOT-25 Package
APPLICATION
Switching frequency is internally set at 1.5MHz,
allowing the use of small surface mount inductors
and capacitors. The internal synchronous switch
increases efficiency and eliminates the need for an
external Schottky diode. Low output voltages are
easily supported with the 0.6V feedback SOT
package.
Wireless and DSL Modems
PDAs
MP3 / MP4 /MPM Player
Digital Still and Video Cameras
Portable Instruments
The A7116 is available in SOT-25 Package.
TYPICAL APPLICATION CIRCUIT
ORDER INFORMATION
Package Type
SOT-25
Part Number
A7116E5R-XXZ
A7116E5VR-XXZ
E5
XX: Output Voltage
12=1.2V, 18=1.8V,33=3.3V
ADJ=Adjustable
Note
Z: Pin Type A or B
V: Halogen free Package
R: Tape & Reel
Figure 1 A7116-ADJ
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
REV1.2
- JAN 2009 RELEASED, MAY 2016 UPDATED -
- 1 -
AITSEMI [ AiT Semiconductor ]
