ltc3730 Linear Technology Corporation, ltc3730 Datasheet - Page 4

• Manufacturer Part Number: ltc3730
• Description: 3-phase, 5-bit Intel Mobile Vid, 600khz, Synchronous Buck Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
LTC3730
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
dissipation P
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
temperature range, otherwise specifications are at T
SYMBOL
Operational Amplifier
I
V
CM
CMRR
I
A
GBP
SR
V
Overtemperature Shutdown
T
4
B
CL
SHDN
OS
VOL
O(MAX)
LTC3730CG: T
J
is calculated from the ambient temperature T
D
according to the following formula:
PARAMETER
Input Bias Current
Input Offset Voltage Magnitude
Common Mode Input Voltage Range
Common Mode Rejection Ratio
Output Source Current
Open-Loop DC Gain
Gain Bandwidth Product
Slew Rate
Maximum High Output Voltage
Temperature Shutdown
J
= T
A
+ (P
D
× 95°C/W)
ITH
= 1.2V).
A
CONDITIONS
I
R
IN
I
I
I
Temperature Rising
and power
OUT
OUT
OUT
OUT
L
+
= 2k
A
= IN
= 1mA
= 1mA
= 1mA
= 1mA
= 25°C. V
–
= 1.2V, I
The
●
CC
denotes the specifications which apply over the full operating
OUT
= V
= 1mA
RUN/SS
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
considerations in the Applications Information Section).
Note 6: The ATTEN
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.
= 5V unless otherwise noted.
ERR
specification is in addition to the output voltage
MAX
V
CC
MIN
130
46
10
0
(see minimum on-time
– 1.2 V
CC
TYP
0.8
15
70
35
30
2
5
– 0.9
V
CC
MAX
200
165
5
– 1.4
UNITS
3730fa
V/µV
MHz
V/µs
mV
mA
nA
dB
°C
V
V