LTC3546IUFD#PBF Linear Technology, LTC3546IUFD#PBF Datasheet - Page 3

• 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

ELECTRICAL CHARACTERISTICS
junction temperature range, otherwise specifi cations are at T
SYMBOL
V
V
V
I
V
ΔV
ΔV
g
V
V
I
I
I
f
I
I
I
I
R
R
R
I
FB1
TRACK/SS1
TRACK/SS2
S
OSC
LIM1
LIM2
LIM1+1D
LIM2+1D
SW1(LKG)
m(EA)
TRACK/SS1
TRACK/SS2
IN1
IN2,
CCD
FB1
DS(ON)1
DS(ON)1D
DS(ON)2
LINEREG
LOADREG
, I
, V
, V
V
FB2
CCA
IN1D
FB2
,
,
,
,
PARAMETER
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage
Reference Voltage Line Regulation
%/V is The Percentage Change in V
with a Change in V
Output Voltage Load Regulation
Error Amplifi er Transconductance
Tracking Voltage Offset
Tracking Current Source
Input DC Supply Current (Note 4)
Active Mode
Half Active Mode (V
Half Active Mode (V
Both Channels in Sleep Mode
Shutdown
Oscillator Frequency
Peak Switch Current Limit on SW1 (1A)
Peak Switch Current Limit on SW2A/B (2A) BMC2 = V
Peak Switch Current Limit on
SW1 + SW1D (2A)
Peak Switch Current Limit on
SW2A/B + SW1D (3A)
SW1 Top Switch On-Resistance (1A)
SW1 Bottom Switch On-Resistance
SW1D Top Switch On-Resistance (1A)
SW1D Bottom Switch On-Resistance
SW2A/B Top Switch On-Resistance (2A)
SW2A/B Bottom Switch On-Resistance
Switch Leakage Current SW1
IN
RUN1
RUN1
= V
= 0, V
IN
, V
RUN2
RUN2
OUT
= V
= 0)
IN
)
CONDITIONS
V
(Note 3)
(Note 3)
V
I
I
(Note 3)
V
V
V
V
V
V
V
V
V
V
V
V
V
V
BMC1 = V
BMC1 = 0.4V, V
BMC2 = 0.4V, V
SW1 Externally Connected to SW1D
BMC1 = V
BMC1 = 0.4V (Note 8)
SW2A/B Externally Connected to SW1D
BMC2 = V
BMC2 = 0.4V (Note 8)
V
V
V
V
V
V
V
V
V
TH1
TH1
TRACK/SS1,2
TRACK/SS1,2
IN1
IN
FB1
RUN1
FB1
RUN2
FB2
RUN2
FB1
RUN1
RUN1
FREQ
FREQ
FREQ
IN2
IN2
IN2
IN2
IN1
IN1
IN
ITH1
RUN1
= 2.25V to 5.5V (Note 3)
= 6V
, I
, I
= V
= 3.6V
= 3.6V
= 3.6V
= 3.6V
= 3.6V
= 3.6V
= V
= 0.55V, V
= 0.55V, V
= V
The
: R
: R
: Resistor (Note 5)
= 0V
TH2
TH2
= V
= 0V
= V
= V
= V
= 0V
IN1D
A
FB2
FB2
T
T
= 0.36V (Note 3)
= 0.84V (Note 3)
RUN2
IN
RUN2
RUN2
IN
IN
IN
IN
= 25°C. V
= V
= 143k
l
, V
, V
= 0.55V, V
= 0.75V, V
(Note 8)
(Note 8)
= V
= 0.3V
= 0V
denotes the specifi cations which apply over the full operating
IN
ITH1
ITH1
MODE
MODE
= V
= V
= 0V
ITH1
ITH1
IN2
IN
IN
= 1.4V
= 1.4V
= V
= 0V
= 0V
= V
= V
IN
MODE
MODE
CCA
= V
IN
IN
, V
, V
= V
CCA
= V
= V
RUN1
RUN1
CCD
IN
IN
= 3.6V, unless otherwise specifi ed. (Note 2)
,
,
= V
= 0V,
IN
,
l
l
l
l
0.588
2.25
0.75
3.75
MIN
0.8
1.8
1.2
1.4
2.8
2.5
–0.02
0.096
0.085
1400
0.04
0.02
1.15
2.25
0.45
0.19
0.18
0.19
0.17
0.01
TYP
600
400
400
160
0.6
0.2
1.5
1.6
3.2
0.9
3.2
1.6
4.8
2.4
LTC3546
0.612
MAX
±0.1
–0.2
990
800
800
300
5.5
0.2
0.2
1.5
2.9
1.8
15
1
4
1
UNITS
3546fb
3
MHz
MHz
MHz
%/V
mV
μA
μS
μA
μA
μA
μA
μA
μA
μA
%
%
Ω
Ω
Ω
Ω
Ω
Ω
V
V
A
A
A
A
A
A
A
A