LTC3588EDD-1#PBF Linear Technology, LTC3588EDD-1#PBF Datasheet - Page 13

• Manufacturer Part Number: LTC3588EDD-1#PBF
• Description: IC ENEGRY HARVESTING PSU 10DFN
• Manufacturer: Linear Technology

Specifications of LTC3588EDD-1#PBF

• Applications: Energy Harvesting
• Voltage - Supply: 2.7 V ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Ic Function: Power Management IC
• Supply Voltage Range: 2.7V To 20V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: DFN
• No. Of Pins: 10
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

APPLICATIONS INFORMATION
This is true for output capacitors on the order of 100μF
or larger, but as the output capacitor decreases towards
10μF delays in the internal sleep comparator along with
the load current may result in the V
past the ±12mV thresholds. This will lengthen the sleep
time and increase V
is not recommended as V
undesirable level.
If transient load currents above 100mA are required then a
larger capacitor can be used at the output. This capacitor
will be continuously discharged during a load condition
and the capacitor can be sized for an acceptable drop in
V
Here V
and V
average current being delivered from the buck converter,
typically I
A standard surface mount ceramic capacitor can be used
for C
to a low leakage aluminum electrolytic capacitor or a
supercapacitor. These capacitors can be obtained from
manufacturers such as Vishay, Illinois Capacitor, AVX,
or CAP-XX.
Inductor
The buck is optimized to work with an inductor in the range
of 10μH to 22μH, although inductor values outside this
range may yield benefi ts in some applications. For typical
applications, a value of 10μH is recommended. A larger
inductor will benefi t high voltage applications by increasing
the on-time of the PMOS switch and improving effi ciency
by reducing gate charge loss. Choose an inductor with a
DC current rating greater than 350mA. The DCR of the
inductor can have an impact on effi ciency as it is a source
OUT
C
OUT
OUT
:
OUT–
OUT+
, though some applications may be better suited
= V
PEAK
(
is the desired lower limit of V
is the value of V
OUT+
/2.
− V
OUT
OUT–
ripple. A capacitor less than 10μF
OUT
)
I
OUT
LOAD
ripple could increase to an
t
when PGOOD goes high
LOAD
−I
BUCK
OUT
OUT
voltage slewing
. I
BUCK
is the
of loss. Tradeoffs between price, size, and DCR should be
evaluated. Table 3 lists several inductors that work well
with the LTC3588-1.
Table 3. Recommended Inductors for LTC3588-1
INDUCTOR
TYPE
CDRH2D18/LDNP
107AS-100M
EPL3015-103ML
MLP3225s100L
XLP2010-163ML
SLF7045T
V
A 1μF capacitor should be connected between V
CAP and a 4.7μF capacitor should be connected between
V
during buck switching and compensate the internal rail
generation circuits. In applications where the input source
is limited to less than 6V, the CAP pin can be tied to GND
and the V
An optional 5.6V Zener diode can be connected to V
clamp V
below its Zener voltage should be considered as it may
be comparable to the quiescent current of the LTC3588-1.
This circuit does not require the capacitors on V
CAP, saving components and allowing a lower voltage
rating for the single V
IN2
IN2
5.6V
(OPTIONAL)
and CAP Capacitors
and GND. These capacitors hold up the internal rails
Figure 6. Smallest Solution Size 1.8V Low Voltage Input
Piezoelectric Power Supply
IN
IN2
in this scenario. The leakage of the Zener diode
pin can be tied to V
(μH)
10μF
6V
100
10
10
10
10
10
L
MAX
(mA)
1000
430
650
350
490
500
IN
I
PZ1
V
V
CAP
D1
D0
DC
IN
IN2
capacitor.
MIDE V21BL
LTC3588-1
0.180
0.145
0.301
0.130 3.2 × 2.5 × 1.0
0.611 2.0 × 1.9 × 1.0
0.250 7.0 × 7.0 × 4.5
MAX
DCR
GND
(Ω)
PGOOD
IN
V
2.8 × 3 × 1.8
2.8 × 3 × 1.5
PZ2
OUT
SIZE in mm
(L × W × H)
SW
as shown in Figure 6.
LTC3588-1
3 × 3 × 2
10μH
35881 F06
FACTURER
Coilcraft
Coilcraft
Sumida
MANU-
13
Toko
IN2
TDK
TDK
PGOOD
V
1.8V
10μF
6V
IN
OUT
35881fa
IN
and
and
to