LTC3589HUJ#PBF Linear Technology, LTC3589HUJ#PBF Datasheet - Page 26

• Manufacturer Part Number: LTC3589HUJ#PBF
• Description: IC DC/DC CONV 8-OUTPUT 40QFN
• Manufacturer: Linear Technology

Specifications of LTC3589HUJ#PBF

• Applications: Handheld/Mobile Devices
• Current - Supply: 8µA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: *
• Primary Input Voltage: 5.5V
• No. Of Outputs: 8
• Output Voltage: 5V
• Output Current: 1.6A
• No. Of Pins: 40
• Operating Temperature Range: -40°C To +150°C
• Msl: MSL 1 - Unlimited
• No. Of Ldo Regulators: 3
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

OPERATION
LTC3589/LTC3589-1
Inductor Selection
Inductor selection criteria for the buck-boost are similar to
those given for the step-down switching regulators. The
buck-boost converter is designed to work with inductors
in the range of 1μH to 3.3μH. For most applications use a
1.5μH inductor. Choose an inductor with a DC current rating
at least two times larger than the maximum load current to
ensure that the inductor does not saturate during normal
operation. If output short-circuit is a possible condition,
the inductor should be rated to handle the maximum peak
current specified for the buck-boost converter. Table 10
shows several inductors that work well with the LTC3589
buck-boost regulator.
26
Table 11. Inductors for Buck-Boost Switching Regulator
MANUFACTURERS
Coilcraft
Cooper
Sumida
TDK
TOKO
Tokin
Wurth
VLCF5020T-2R7N2R2-1
VLCF5020T-3R3N2R0-1
VLF5014ST-2R2N2R3
CDRH5D16NP-3R3N
CDRH5D16NP-4R7N
XPL4020-222ML
XPL4020-332ML
LPS6225-332ML
LPS6225-472ML
XPL4020-152ML
H-DI-0520-3R3
H-DI-0630-3R8
1124BS-3R3N
1124BS-1R8N
SD25-3R3-R
7440530047
SD14-1R5-R
SD14-2R0-R
SD14-2R5-R
SD14-3R2-R
7440420027
744052002
744053003
NUMBER
PART
VALUE
(μH)
2.2
3.3
3.3
2.0
2.5
3.2
3.3
3.3
4.7
2.2
2.7
3.3
3.3
3.3
3.8
2.5
2.7
3.0
4.7
1.5
4.7
1.5
1.8
Table 10. Buck-Boost Command Register Settings
COMMAND
REGISTER[BIT]
SCR1[6]
OVEN[3]
SCR2[3]
* Denotes Default Power-On Value
DCR (Ω)
0.036
0.060
0.085
0.055
0.065
0.039
0.045
0.060
0.066
0.038
0.045
0.064
0.073
0.083
0.096
0.056
0.062
0.040
0.030
0.047
0.030
0.074
0.024
CURRENT (A)
MAX DC
3.60
2.60
2.40
3.50
3.00
2.91
2.56
2.29
2.00
2.21
2.60
2.05
2.70
2.00
2.00
2.10
2.3
2.2
2.4
2.2
2.8
2.4
VALUE
2
0*
1
0*
1
0*
1
SETTING
Continuous Mode
Burst Mode Operation
Disable
Enable
Wait for Output Below 300mV Before Enable
Enable Immediately
SIZE (mm) W × L × H
5.2 × 5.2 × 1.45
5.2 × 5.2 × 1.45
5.2 × 5.2 × 1.45
5.2 × 5.2 × 1.45
4.2 × 4.2 × 2.0
4.2 × 4.2 × 2.0
4.2 × 4.2 × 2.0
6.0 × 6.0 × 2.0
6.0 × 6.0 × 2.0
4.8 × 4.8 × 2.5
5.0 × 5.0 × 2.0
5.0 × 5.0 × 2.0
5.3 × 5.3 × 2.0
6.3 × 6.3 × 3.0
5.8 × 5.8 × 1.8
5.8 × 5.8 × 2.8
5.8 × 5.8 × 2.8
5.6 × 5.6 × 1.8
5.6 × 5.6 × 1.8
4.8 × 4.6 × 1.4
4.5 × 4.7 × 1.8
4.5 × 4.7 × 1.8
4.8 × 4.8 × 1.8
3589fc