LTC3736EGN-2#PBF Linear Technology, LTC3736EGN-2#PBF Datasheet - Page 4

• Manufacturer Part Number: LTC3736EGN-2#PBF
• Description: IC CTRLR SW SYNC DUAL 2PH 24SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3736EGN-2#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 9.8 V
• Current - Output: 1A
• Frequency - Switching: 550kHz ~ 750kHz
• Voltage - Input: 2.75 ~ 9.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

LTC3736-2
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3736E-2 is guaranteed to meet specifi ed performance
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating range
are assured by design, characterization and correlation with statistical
process controls.
Note 3: T
dissipation P
TYPICAL PERFORMANCE CHARACTERISTICS
50mV/DIV
COUPLED
4
100
5V/DIV
2A/DIV
95
90
85
80
75
70
65
60
55
50
T
V
J
OUT
SW
AC
1
= T
Effi ciency and Power Loss
vs Load Current
I
L
V
OUT
Light Load
(Pulse-Skipping Mode)
V
V
I
SYNC/FBC = V
FIGURE 15 CIRCUIT
J
A
LOAD
IN
OUT
is calculated from the ambient temperature T
+ (P
= 2.5V
= 5V
D
= 2.5V
= 300mA
according to the following formula:
10
D
LOAD CURRENT (mA)
EFFICIENCY
• θ
JA
IN
°C/W)
2.5μs/DIV
100
POWER LOSS
1000
V
V
IN
IN
= 3.3V
= 5V
37362 G01
10000
37362 G04
10
1
0.01
0.001
0.1
AC COUPLED
A
50mV/DIV
COUPLED
and power
100mV/
2A/DIV
5V/DIV
2A/DIV
V
V
OUT
OUT
DIV
SW
AC
I
I
L
L
V
V
I
SYNC/FCB = 0V
FIGURE 15 CIRCUIT
V
V
I
SYNC/FCB = 0V
FIGURE 15 CIRCUIT
Load Step
(Forced Continuous Mode)
Light Load
(Forced Continuous Mode)
LOAD
LOAD
IN
OUT
IN
OUT
= 5V
= 3.3V
= 1.8V
= 2.5V
= 300mA TO 3A
= 300mA
Note 4: Dynamic supply current is higher due to gate charge being
delivered at the switching frequency.
Note 5: The LTC3736-2 is tested in a feedback loop that servos I
specifi ed voltage and measures the resultant V
Note 6: Peak current sense voltage is reduced dependent on duty cycle to
a percentage of value as shown in Figure 1.
100μs/DIV
2.5μs/DIV
T
A
= 25°C, unless otherwise noted.
37362 G02
37362 G05
COUPLED
500mV/
100mV/
2A/DIV
V
DIV
OUT
DIV
AC
I
L
V
R
FIGURE 15 CIRCUIT
Tracking Start-Up with Internal
Soft-Start (C
Load Step (Pulse-Skipping Mode)
V
V
I
SYNC/FCB = V
FIGURE 15 CIRCUIT
IN
LOAD
LOAD1
IN
OUT
= 5V
= 3.3V
= 1.8V
= 300mA TO 3A
= R
LOAD2
FB
IN
voltage.
SS
200μs/DIV
= 1Ω
100μs/DIV
= 0μF)
TH
to a
V
2.5V
V
1.8V
37362fb
OUT1
OUT2
37362 G06
37362 G03