ltc1629-6 Linear Technology Corporation, ltc1629-6 Datasheet - Page 4

• Manufacturer Part Number: ltc1629-6
• Description: Polyphase, Synchronous Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

LTC1629-6
temperature range, otherwise specifications are at T
SYMBOL
Differential Amplifier Gain Block (Note 5)
A
CMRR
R
Note 1: Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2: T
dissipation P
Note 3: The I.C. is tested in a feedback loop that servos V
specified voltage and measures the resultant V
ELECTRICAL CHARACTERISTICS
4
TYPICAL PERFOR A CE CHARACTERISTICS
DA
IN
100
T
80
60
40
20
0
J
0.1
DA
= T
Efficiency vs Output Current
(Figure 12)
J
A
is calculated from the ambient temperature T
+ (P
D
PARAMETER
Gain
Common Mode Rejection Ratio
Input Resistance
according to the following formulas:
D
OUTPUT CURRENT (A)
• 95 C/W)
1
V
V
V
V
IN
IN
IN
IN
= 5V
= 8V
= 12V
= 20V
10
V
V
I
OUT
OUT
EXTVCC
W
= 20A
= 3.3V
= 5V
1629 G01
U
100
EAIN
.
CONDITIONS
0V < V
Measured at V
A
100
and power
90
80
70
60
50
ITH
1
Efficiency vs Output Current
(Figure 12)
A
to a
CM
= 25 C. V
< 5V
The
V
EXTVCC
OS
OUTPUT CURRENT (A)
+ Input
IN
denotes the specifications which apply over the full operating
V
= 5V
EXTVCC
= 15V, V
10
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 the on inductor
peak-to-peak ripple current 40% of I
Considerations in the Applications Information section).
Note 6: The LTC1629EG-6 is guaranteed to meet performance
specifications from 0 C to 70 C. Specifications over the – 40 C to 85 C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
= 0V
RUN/SS
V
OUT
= 3.3V
= 5V unless otherwise noted.
1629 G02
100
100
90
80
70
Efficiency vs Input Voltage
(Figure 12)
5
V
V
I
0.995
OUT
MIN
OUT
EXTVCC
46
MAX
= 20A
= 3.3V
(see Minimum On-Time
= 5V
10
TYP
55
80
1
V
IN
(V)
1.005
MAX
15
1629 G03
UNITS
16296f
V/V
k
20
dB