LTC1629 LINER [Linear Technology], LTC1629 Datasheet - Page 4

• Manufacturer Part Number: LTC1629
• Description: PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
LTC1629/LTC1629-PG
temperature range, otherwise specifications are at T
SYMBOL
V
I
A
V
CMRR
PSRR
I
V
GBW
SR
Note 1: Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2: T
dissipation P
LTC1629/LTC1629-PG: T
Note 3: The LTC1629/LTC1629-PG are tested in a feedback loop that
servos V
4
TYPICAL PERFOR A CE CHARACTERISTICS
B
CL
OS
OL
CM
OMAX
100
80
60
40
20
0
OA
0.1
OA
Efficiency vs Output Current
(Figure 12)
ITH
J
is calculated from the ambient temperature T
to a specified voltage and measures the resultant V
D
PARAMETER
Input Offset Voltage
Input Bias Current
Open Loop DC Gain
Common Mode Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Maximum Output Current
Maximum Output Voltage
Gain-Bandwidth Product
Slew Rate
according to the following formulas:
OUTPUT CURRENT (A)
1
J
V
V
V
V
= T
IN
IN
IN
IN
= 5V
= 8V
= 12V
= 20V
A
+ (P
10
V
V
I
OUT
OUT
EXTVCC
D
W
= 20A
• 95 C/W)
= 3.3V
= 5V
1629 G01
U
100
CONDITIONS
Op Amp Mode; V
V
Op Amp Mode; LTC1629 Only
Op Amp Mode; 0.7V V
Op Amp Mode; LTC1629 Only
Op Amp Mode; 0V < V
Op Amp Mode; 6V < V
Op Amp Mode; V
Op Amp Mode; I
Op Amp Mode; I
Op Amp Mode; R
A
100
DIFFOUT
and power
90
80
70
60
50
1
Efficiency vs Output Current
(Figure 12)
A
= 25 C. V
EAIN
= 5V; I
.
V
The
EXTVCC
DIFFOUT
OUTPUT CURRENT (A)
DIFFOUT
DIFFOUT
CM
DIFFOUT
L
IN
= 2k; LTC1629 Only
V
= 2.5V; LTC1629 Only
= 5V
EXTVCC
denotes the specifications which apply over the full operating
= 15V, V
CM
IN
= 1mA
= 1mA; LTC1629 Only
= 1mA; LTC1629 Only
10
DIFFOUT
< 30V; LTC1629 Only
= 0V; LTC1629 Only
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5: When the AMPMD pin is high, the IC pins are connected directly to
the internal op amp inputs. When the AMPMD pin is low, internal MOSFET
switches connect four 40k resistors around the op amp to create a
standard unity-gain differential amp.
Note 6: The minimum on-time condition corresponds to the on inductor
peak-to-peak ripple current 40% of I
Considerations in the Applications Information section).
< 3V; LTC1629 Only
= 0V
RUN/SS1, 2
< 10V; LTC1629 Only
V
OUT
= 3.3V
1629 G02
= 5V unless otherwise noted.
100
100
90
80
70
Efficiency vs Input Voltage
(Figure 12)
5
V
V
I
OUT
MIN
OUT
EXTVCC
70
70
10
10
MAX
0
= 20A
= 3.3V
(see Minimum On-Time
= 5V
10
5000
TYP
30
90
90
35
11
2
5
V
IN
(V)
MAX
200
15
6
3
1629 G03
UNITS
V/mV
MHz
V/ s
mV
mA
20
nA
dB
dB
V
V