LTC3546IUFD#PBF Linear Technology, LTC3546IUFD#PBF Datasheet - Page 11

• 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

FUNCTIONAL DIAGRAM
V
RUN1
TRACK/SS1
SYNC/MODE
V
GNDA
V
GNDD
TRACK/SS2
RUN2
V
FB1
CCA
CCD
FB2
REFERENCE
VOLTAGE
V
V
CCA
CCA
1.15μA
1.15μA
0.552V
0.552V
0.63V
0.63V
SOFT-START
SOFT-START
INTERNAL
INTERNAL
AUTO DETECT AND CONTROL
+
–
+
–
+
–
–
+
–
+
–
+
DEPENDENT SWITCH
I
I
TH1
TH2
V
V
B
B
MUX
MUX
–
+
+
–
BMC1
BMC2
I
I
TH
TH
LOGIC
LOGIC
LIMIT
LIMIT
ANTI-SHOOT
ANTI-SHOOT
COMPENSATION
COMPENSATION
MUX
THRU
THRU
SLOPE
SLOPE
1A REGULATOR
2A REGULATOR
ANTI-SHOOT
+
–
–
+
OSCILLATOR
+
–
–
+
THRU
1A DEPENDENT
+
–
–
+
SWITCHES
V
V
IN1
IN2
PGOOD1
PGND1D
PGOOD2
PGND1
PGND2
PHASE
SW1D
SW2A
SW2B
V
FREQ
SW1
IN1D
3546 BD
LTC3546
11
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