AS3709 Datasheet, PDF (1/74 Pages) ams AG – μPMIC with 5 DCDC and 2 LDOs

AS3709
μPMIC with 5 DCDC and 2 LDOs
General Description
The AS3709 is an ultra compact μPMIC containing 5
high-efficiency, constant-frequency synchronous buck
converters in addition with two universal IO LDOs are available
for lower current power rails. The wide input voltage range (2.7V
to 5.5V), automatic power-save mode and minimal external
component requirements make the AS3709 perfect for any
single Li-Ion battery-powered or fixed 3.3V/5V supply
application. Typical supply current with no load is 110μA and
decreases to ≤ 7μA in shutdown mode. An internal synchronous
switch increases efficiency and eliminates the need for an
external Schottky diode. The internally fixed switching
frequency (2MHz, 3MHz or 4MHz) allows the use of small surface
mount external components. Very low output voltages can be
delivered with the internal 0.6V feedback reference voltage. The
AS3709 is available in a 32-pin QFN 4x4mm package and in a
very compact CSP36 with 0.4mm pitch.
For further understanding in regards to the contents of the
datasheet, please refer to the Reference Guide located at the end
of the document.
Figure 1:
Added Value of using AS3709
Key Benefits & Features
The benefits and features of AS3709, μPMIC with 5 DCDC and 2
LDOs are listed below:
Benefits
Features
Compact design due to small coils for IO and memory
voltage generation
5 DCDC step down regulators (2-4MHz)
Independent voltage rails for general purpose IO
supplies
2 universal IO LDOs
Flexible and fast adaptation to different
processors/applications
OTP programmable Boot and Power-down sequence
Power saving control according to the processor‘s
needs.
Stand-by function with programmable sequence and
voltages
Self-contained start-up and control for single-cell
battery applications.
Safety shutdown feature.
Control Interface
I²C/SPI control lines
ON key with 4/8s emergency shut-down
POR with RESET I/O
Dedicated packages for specific applications.
Optimization for PCB cost or size.
32-pin QFN (4x4mm), 0.4mm pitch
36-ball WL-CSP 0.4mm pitch
ams Datasheet, Confidential: 2013-Aug [1-02]
AS3709 – 1