LTC3455EUF-1#PBF Linear Technology, LTC3455EUF-1#PBF Datasheet - Page 25

• Manufacturer Part Number: LTC3455EUF-1#PBF
• Description: IC DC/DC CONV DUAL CHRG 24-QFN
• Manufacturer: Linear Technology

Specifications of LTC3455EUF-1#PBF

• Applications: Handheld/Mobile Devices
• Voltage - Supply: 3 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

TYPICAL APPLICATIONS
using the battery charger to slowly charge this capacitor
(normally using such a large capacitor would result in
very large inrush currents). With the TIMER pin tied to
USB 5V
4.7μF
C6
1Ω
Figure 16. Standalone USB Power Supply with Temporary Backup Power
DROPOUT
5.6V
V
1.8V
MAX
82.5k
CONTROLLER
20k
4700μF
USB
10μF
C5
C4
10k
V
MAX
2.49k
1M
10
11
17
16
8
6
5
4
3
2
9
C1, C2, C3, C5, C6: X5R OR X7R CERAMIC
L1, L2: TOKO DB318C
ALL RESISTORS 1%
USB
SUSPEND
USBHP
V
CHRG
WALLFB
TIMER
PROG
V
AO
AI
MAX
BAT
LTC3455/LTC3455-1
V
mode (the voltage-loop and timer function are disabled),
so the 4700μF capacitor is always fully charged to the
available USB voltage.
MAX
PWRON
PBSTAT
MODE
HSON
, the battery charger operates in constant-current
SW2
SW1
GND
HSO
ON2
RST
FB2
FB1
HSI
3455 F16
ON
21
15
19
22
20
23
24
14
13
12
18
7
1
25
L2, 4.7μH
L1, 4.7μH
10pF
10pF
1M
LTC3455/LTC3455-1
1M
ON/OFF
C3
1μF
μC
3.3V, HS
249k
80.6k
100k
80.6k
1.8V
C2
10μF
C1
10μF
3.3V
0.4A
1.8V
0.2A
25
3455fc