LTC3736-2 Datasheet, PDF (5/28 Pages) Linear Technology – Dual 2-Phase, No RSENSE Synchronous Controller with Output Tracking

LTC3736-2
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Maximum Current Sense Voltage
vs I_TH Pin Voltage
100
FORCED CONTINUOUS
MODE
80
PULSE-SKIPPING
MODE
60
40
20
0
–20
0.5
1
1.5
I_TH VOLTAGE (V)
2
37362 G09
Shutdown (RUN) Threshold
vs Temperature
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–60 –40 –20 0 20 40 60 80 100
TEMPERATURE (°C)
37362 G12
Efficiency vs Load Current
100
FIGURE 15 CIRCUIT
95 _{VIN = 3.3V}
90 ^{VOUT = 2.5V}
85
80
PULSE-SKIPPING
MODE
75 ^{(SYNC/FCB = V}IN⁾
70
65
60
FORCED
CONTINUOUS
55
(SYNC/FCB = 0V)
50
1
10
100
1000 10000
LOAD CURRENT (mA)
37362 G10
RUN/SS Pull-Up Current
vs Temperature
1.0
0.9
0.8
0.7
0.6
0.5
0.4
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
37362 G13
Regulated Feedback Voltage
vs Temperature
0.606
0.605
0.604
0.603
0.602
0.601
0.600
0.599
0.598
0.597
0.596
0.595
0.594
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
37362 G14
Maximum Current Sense Threshold
vs Temperature
180
I_PRG = GND
175
170
165
160
155
150
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
37362 G11
Oscillator Frequency
vs Temperature
10
8
6
4
2
0
–2
–4
–6
–8
–10
–60 –40 –20 0 20 40 60 80 100
TEMPERATURE (°C)
37362 G15
Undervoltage Lockout Threshold
vs Temperature
2.50
2.45
V_IN RISING
2.40
2.35
2.30
V_IN FALLING
2.25
2.20
2.15
2.10
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
37362 G16
37362fa
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