LTC1435CS Linear Technology, LTC1435CS Datasheet - Page 3

• Manufacturer Part Number: LTC1435CS
• Description: IC SW REG SYNC STEP-DOWN 16-SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1435CS

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.19 ~ 9 V
• Current - Output: 50mA
• Frequency - Switching: 125kHz
• Voltage - Input: 3.5 ~ 30 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
The
temperature range.
Note 1: T
dissipation P
TYPICAL PERFORMANCE CHARACTERISTICS
100
0.4
0.2
0.1
0.5
0.3
LTC1435CG/LTC1435CS: 0 C T
LTC1435IG/LTC1435IS: – 40 C T
LTC1435CG/LTC1435IG: T
LTC1435CS/LTC1435IS: T
95
90
85
80
75
70
0
0
0
denotes specifications which apply over the full operating
Efficiency vs Input Voltage
V
V
vs Load Current
R
V
OUT
V
IN
OUT
OUT
SENSE
J
– V
is calculated from the ambient temperature T
0.5
= 3.3V
5
DROP OF 5%
= 3.3V
D
OUT
= 0.033
according to the following formula:
INPUT VOLTAGE (V)
LOAD CURRENT (A)
1.0
10
Dropout Voltage
I
LOAD
1.5
15
= 1A
J
J
I
LOAD
2.0
= T
20
= T
A
A
= 100mA
W
+ (P
A
+ (P
2.5
A
25
70 C
D
1435 G01
1435 G04
D
85 C
)(110 C/W)
)(130 C/W)
U
3.0
30
– 0.25
– 0.50
– 0.75
–1.00
–1.25
–1.50
100
A
95
90
85
80
75
70
0
and power
0
0
Efficiency vs Input Voltage
V
Load Regulation
OUT
0.5
= 5V
5
T
A
= 25 C, V
I
INPUT VOLTAGE (V)
LOAD CURRENT (A)
LOAD
1.0
10
= 100mA
1.5
15
Note 2: The LTC1435 is tested in a feedback loop which servos V
to the balance point for the error amplifier (V
Note 3: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 4: Oscillator frequency is tested by measuring the C
discharge currents and applying the formula:
IN
I
LOAD
f
R
OSC
= 15V, V
SENSE
2.0
20
= 1A
(kHz) =
V
= 0.033
OUT
2.5
25
RUN/SS
= 5V
1435 G02
1435 G05
C
3.0
30
OSC
8.4(10
= 5V unless otherwise noted.
(pF) + 11
8
)
100
3.0
2.5
2.0
1.5
1.0
0.5
80
95
90
85
75
70
65
60
55
50
0
0.001
0
Efficiency vs Load Current
V
V
V
R
I
ITH
OPERATION
Burst Mode
CHG
IN
OUT
SENSE
10
1
= 10V
Pin Voltage vs Output Current
= 5V
Burst Mode
OPERATION
+
20
= 0.033
0.01
I
DIS
OUTPUT CURRENT (%)
1
30
LOAD CURRENT (A)
ITH
–1
40
= 1.19V).
CONTINUOUS
MODE
0.1
50
LTC1435
CONTINUOUS
MODE
60
OSC
70
charge and
1
80
OSENSE
90
1435 G03
1435 G06
3
100
10