LTC3734 Datasheet, PDF (3/28 Pages) Linear Technology – Single-Phase, High Efficiency DC/DC Controller for Intel Mobile CPUs

LTC3734
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_PVCC = V_SVCC = 5V, V_RUN/SS = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP MAX UNITS
I_Q
UVR
I_RUN/SS
V_RUN/SS
V_RUN/SSARM
V_RUN/SSLO
I_SCL
I_SDLHO
I_SENSE
DF_MAX
TG t_r
TG t_f
BG t_r
BG t_f
TG/BG t_1D
Input DC Supply Current
Normal Mode
Shutdown
Undervoltage RUN/SS Reset
Soft-Start Charge Current
RUN/SS Pin ON Threshold
RUN/SS Pin Latchoff Arming
RUN/SS Pin Latchoff Threshold
RUN/SS Discharge Current
Shutdown Latch Disable Current
Total Sense Pins Source Current
Maximum Duty Factor
Top Gate Transition Time:
Rise Time
Fall Time
Bottom Gate Transition Time:
Rise Time
Fall Time
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
(Note 5)
V_RUN/SS = 0V
V_CC Lowered Until the RUN/SS Pin is Pulled Low
V_RUN/SS = 1.9V
V_RUN/SS Rising
V_RUN/SS Rising from 3V
V_RUN/SS Ramping Negative
Soft Short Condition V_FB = 0.375V, V_RUN/SS = 4.5V
V_FB = 0.375V, V_RUN/SS = 4.5V
V_SENSE– = V_SENSE+ = 0V
In Dropout
(Note 6)
C_LOAD = 3300pF
C_LOAD = 3300pF
(Note 6)
C_LOAD = 3300pF
C_LOAD = 3300pF
C_LOAD = 3300pF (Note 6)
2
3
mA
20
100
μA
3.2
3.7
4.2
V
–2.3
–1.5 – 0.8
μA
1.0
1.5
1.9
V
3.9
V
3.2
V
–5
–1.5
μA
1.5
5
μA
– 85
– 60
μA
95
98.5
%
30
90
ns
40
90
ns
60
90
ns
50
90
ns
50
ns
BG/TG t_2D Bottom Gate Off to Top Gate On Delay C_LOAD = 3300pF (Note 6)
Top Switch-On Delay Time
60
ns
t_ON(MIN)
Minimum On-Time
VID Parameters
Tested with a Square Wave (Note 7)
100
ns
R_ATTEN
ATTEN_ERR
VID_THLOW
VID_THHIGH
VID_LEAK
Oscillator
VID Top Resistance
Resistive Divider Error
VID0 to VID5 Logic Threshold Low
VID0 to VID5 Logic Threshold High
VID0 to VID5 Leakage
(Note 8)
5.33
kΩ
● – 0.25
0.25
%
0.3
V
0.7
V
±1
μA
I_FREQSET FREQSET Input Current
f_NOM
Nominal Frequency
f_LOW
Lowest Frequency
f_HIGH
Highest Frequency
PGOOD Output
V_FREQSET = 0V
V_FREQSET = 1.2V
V_FREQSET = 0V
V_FREQSET ≥ 2.4V
–2
–1
μA
320
355 390
kHz
190
210 240
kHz
490
550 610
kHz
V_PGL
I_PGOOD
V_PG
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
t_MASK
t_DELAY
PGOOD Mask Timer
MCH_PG Delay Time
I_PGOOD = 2mA
V_PGOOD = 5V
V_FB with Respect to Set Output Voltage
V_FB Ramping Negative
V_FB Ramping Positive
0.1
0.3
V
±1
μA
–7
– 10 – 13
%
7
10
13
%
100
110 120
μs
15
cycles
3734f
3