LTC3546IUFD#PBF Linear Technology, LTC3546IUFD#PBF Datasheet - Page 25

• Manufacturer Part Number: LTC3546IUFD#PBF
• Description: IC BUCK SYNC ADJ 1A/2A DL 28QFN
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3546IUFD#PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 5 V
• Current - Output: 1A, 2A
• Frequency - Switching: 2.25MHz, 0.75MHz ~ 4MHz
• Voltage - Input: 2.25 ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Dc To Dc Converter Type: Step Down
• Pin Count: 28
• Input Voltage: 5.5V
• Output Voltage: 0.6 to 5V
• Switching Freq: 750 TO 4000/2900KHz
• Output Current: 2A
• Efficiency: 96%
• Package Type: QFN EP
• Output Type: Adjustable
• Switching Regulator: Yes
• Load Regulation: 0.2%
• Line Regulation: 0.2%/V
• Mounting: Surface Mount
• Input Voltage (min): 2.25V
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Compliant

APPLICATIONS INFORMATION
100
OUT1 Effi ciency (Burst Mode Operation)
95
90
85
80
75
70
0.001
2.25V TO 5.5V
2.5V, 3A
V
C
OUT2
0.01
LOAD CURRENT (A)
OUT2
33μF
V
IN
x2
EFFICIENCY
POWER LOSS
22μF
C
100pF
95.3k
0.1
C
IN
R3
FF2
30.1k
Figure 9. Typical Schematic for 3A/1A Regulator
R4
0.56μH
3546 F09b
L2
1000pF
C
100k
R
ITH2
1
R5
ITH2
13k
100
10
1
0.1
0.01
0.001
0.0001
V
V
IN
IN
EXPOSED PAD
SYNC/MODE
PGOOD2
SW2A
SW2B
SW1D
RUN2
V
BMC2
TRACK/SS2
PHASE
I
TH2
PGND2
FB2
V
IN1
V
CCA
LTC3546
GNDA
V
CCD
TRACK/SS1
PGOOD1
PGND1
V
BMC1
RUN1
IN2
FREQ
SW1
V
I
TH1
FB1
100
OUT2 Effi ciency (Burst Mode Operation)
95
90
85
80
75
70
0.001
V
V
R
13k
R6
100k
IN
IN
SW1D CONNECTED TO SW2
V
V
ITH1
C
1000pF
IN
OUT
ITH1
= 3.6V
= 2.5V
1.2μH
L1
0.01
R2
30.1k
R
143k
EFFICIENCY
FREQ
LOAD CURRENT (A)
100pF
C
59k
R1
FF1
POWER LOSS
0.1
3546 F09
1
C
22μF
V
1.8V, 1A
OUT1
OUT1
LTC3546
3546 F09c
10
100
10
1
0.1
0.01
0.001
0.0001
25
3546fb