LTC3730_15 Datasheet, PDF (4/28 Pages) Linear Technology – 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller

LTC3730
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = V_RUN/SS = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Operational Amplifier
I_B
Input Bias Current
V_OS
Input Offset Voltage Magnitude
CM
Common Mode Input Voltage Range
CMRR
Common Mode Rejection Ratio
I_CL
Output Source Current
A_VOL
Open-Loop DC Gain
GBP
Gain Bandwidth Product
SR
Slew Rate
V_O(MAX)
Maximum High Output Voltage
Overtemperature Shutdown
IN⁺ = IN^– = 1.2V, I_OUT = 1mA
I_OUT = 1mA
I_OUT = 1mA
I_OUT = 1mA
R_L = 2k
I_OUT = 1mA
15
200
nA
0.8
5
mV
0
V_CC – 1.4
V
46
70
dB
10
35
mA
30
V/µV
2
MHz
5
V/µs
V_CC – 1.2 V_CC – 0.9
V
T_SHDN
Temperature Shutdown
Temperature Rising
130
165
°C
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired. A maximum current of 200µA is allowed to
pull up the RUN/SS pin to prevent overcurrent shutdown.
Note 2: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formula:
LTC3730CG: T_J = T_A + (P_D × 95°C/W)
Note 3: The IC is tested in a feedback loop that includes the operational
amplifier in a unity-gain configuration loaded with 100µA to ground driving
the VID DAC into the error amplifier and servoing the resultant voltage to
the midrange point for the error amplifier (V_ITH = 1.2V).
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5: The minimum on-time condition corresponds to an inductor peak-
to-peak ripple current of ≥ 40% of I_MAX (see minimum on-time
considerations in the Applications Information Section).
Note 6: The ATTEN_ERR specification is in addition to the output voltage
accuracy specified at VID Code = 11111.
Note 7: This IC includes overtemperature protection that is intended to protect
the device during momentary overload conditions. Junction temperature will
exceed 125°C when overtemperature protection is active. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
3730fa
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