LTC4090EDJC#PBF Linear Technology, LTC4090EDJC#PBF Datasheet - Page 26

• Manufacturer Part Number: LTC4090EDJC#PBF
• Description: IC USB POWER MANAGER 22-DFN
• Manufacturer: Linear Technology

Specifications of LTC4090EDJC#PBF

• Function: Power Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 4.35 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 22-WFDFN Exposed Pad
• Supply Voltage Range: 4.35V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: DFN
• No. Of Pins: 22
• Msl: MSL 1 - Unlimited
• Termination Type: SMD
• Supply Voltage Min: 4.35V
• Rohs Compliant: Yes
• Filter Terminals: SMD
• Frequency: 2.7MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC4090/LTC4090-5
APPLICATIONS INFORMATION
IN and HVIN Bypass Capacitor
Many types of capacitors can be used for input bypassing;
however, caution must be exercised when using multilayer
ceramic capacitors. Because of the self-resonant and high
Q characteristics of some types of ceramic capacitors,
high voltage transients can be generated under some
start-up conditions, such as from connecting the charger
input to a hot power source. For more information, refer
to Application Note 88.
TYPICAL APPLICATIONS
TRANSIENT TO 60V*
26
HIGH (7.5V TO 36V)
USB
L: SUMIDA CDRH8D28/HP-100
* USE SCHOTTKY DIODE RATED AT V
35k
330pF
Figure 13. 400kHz Switching Frequency
88.7k
1μF
4.7μF
(7.5V TO 36V)
HVIN
IN
V
R T
TIMER
C
VOLTAGE
INPUT
0.1μF
HIGH
USB
CLPROG
R
LTC4090
> 45V
BOOST
2.1k
D: DIODES INC. B360A
L: SUMIDA CDR6D28MN-GR5
Q1, Q2: SILICONIX Si2333DS
270pF
GND
C1
1μF
50V
1206
4.7μF
6.3V
HVOUT
HVPR
PROG
0.47μF
OUT
BAT
SW
0.1μF
71.5k
71.5k
40.2k
2.1k
+
59k
1%
1%
1%
1%
Figure 12. 800kHz Switching Frequency
Li-Ion BATTERY
10μH
L
HVIN
HVEN
IN
HPWR
V
SUSP
TIMER
CLPROG
PROG
R
PG
SYNC
1k
C
T
4.7μF
4090 TAO3
Q1
LTC4090
LOAD
4.7μF
BOOST
HVOUT
Battery Charger Stability Considerations
The constant-voltage mode feedback loop is stable without
any compensation when a battery is connected with low
impedance leads. Excessive lead length, however, may add
enough series inductance to require a bypass capacitor
of at least 1μF from BAT to GND. Furthermore, a 4.7μF
capacitor with a 0.2Ω to 1Ω series resistor to GND is
recommended at the BAT pin to keep ripple voltage low
when the battery is disconnected.
HIGH (7.5V TO 16V)
HVPR
CHRG
VNTC
GATE
OUT
NTC
BAT
SW
VOLTAGE INPUT
L: SUMIDA CDRH4D22/HP-2R2
30k
USB
330pF
10k
1%
680Ω
0.47μF
16V
D1
Figure 14. 2MHz Switching Frequency
Q2
1k
11.5k
1μF
4.7μF
T
6.8μH
L1
10k
HVIN
IN
V
R T
TIMER
C
+
0.1μF
4.7μF
6.3V
Li-Ion
BATTERY
C3
22μF
6.3V
1206
CLPROG
LTC4090
4090 F12
BOOST
2.1k
Q1
GND
LOAD
680Ω
HVOUT
PROG
HVPR
OUT
0.47μF
BAT
SW
71.5k
+
Li-Ion BATTERY
2.2μH
L
1k
4.7μF
4090 TAO4
Q1
4090fc
LOAD
22μF