Thanks to its ultra-low noise value and high PSRR, the LDLN025 provides a very clean output, suitable for
ultra-sensitive loads. It is stable with ceramic capacitors.
The enable logic control function makes the device enter shutdown mode, with a total current consumption lower
than 1 μA.
The device also includes short-circuit and thermal protections.
T
ypical applications are noise-sensitive loads such as ADC, VCO in mobile phones and tablets, and wireless LAN
devices.
The LDLN025 is designed to keep the quiescent current under control, at a low value also during the dropout
operation.
1.6.3.5 ST1PS02
The ST1PS02 is a nano-quiescent miniaturized synchronous step-down converter
, which is able to provide up to
400 mA output current with an input voltage ranging from 1.8 to 5.5 V.
This converter is designed for applications where the key factors are high efficiency, PCB size, and thickness.
The output voltage can be set using three digital control inputs. A V
OUT
from 1.0 to 3.3 V can be dynamically
selected.
Thanks to the enhanced peak current control (PCC), the ST1PS02 reaches a very high efficiency conversion
using just a 2.2 µH inductor and two small capacitors.
The device embeds a controlled load switch to supply a subsystem with the same voltage rail. The advanced
design circuitry is implemented to minimize the quiescent current. The device is available in a thin plastic
package.
1.6.3.6 STBC02
The STBC02 is a highly integrated power management device. It embeds a linear battery charger
, a 150 mA
LDO, two SPDT load switches, a smart reset/watchdog block, and a protection circuit module (PCM) to prevent
battery damage under fault conditions.
The STBC02 uses a CC/CV algorithm to charge the battery. You can program the fast charge and the precharge
current independently by using dedicated resistors.
The termination current is set by default, being 5% of the programmed fast charge current, but you can also fix it
at different values. Likewise, you can program the battery-floating voltage value and set it to a value up to 4.45 V.
The STBC02 also features a charger enable input to stop the charging process anytime.
The STBC02 is automatically powered off from the connected battery when the IN pin is not connected
to a valid power source (battery mode). An external circuitry (NTC thermistor) can detect any battery under/
overtemperature condition.
The STBC02 draws less than 10 nA from the connected battery in shipping mode conditions in order to maximize
the battery life. The device is available in a flip-chip package.
1.6.3.7 USBLC6-2
The USBLC6-2SC6 is a device specific for monolithic applications dedicated to ESD protection of high-speed
interfaces, such as USB 2.0, Ethernet links, and video lines.
The very low line capacitance secures a high level of signal integrity without compromising sensitive chip
protection against the most stringently characterized ESD strikes.
1.6.3.8 Battery connectors
Connect the 480 mA LiPo battery included in the STWIN.box kit to the dedicated battery connector (BA
TT1) in
order to provide the battery supply voltage (VBAT).
UM2965
Functional blocks
UM2965 - Rev 1
page 19/58
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