LTC1772BES6#TRM Linear Technology, LTC1772BES6#TRM Datasheet - Page 3

• Manufacturer Part Number: LTC1772BES6#TRM
• Description: IC CTRLR DC/DC S-DWN SOT23-6
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1772BES6#TRM

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 9.8 V
• Current - Output: 1A
• Frequency - Switching: 550kHz
• Voltage - Input: 2.5 ~ 9.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-6, TSOT-6
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LTC1772BES6#TRMTR

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
V
Overvoltage Protect Threshold
Overvoltage Protect Hysteresis
Oscillator Frequency
Gate Drive Rise Time
Gate Drive Fall Time
Peak Current Sense Voltage
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC1772BE is guaranteed to meet specifi cations from 0°C to
85°C. Specifi cations over the –40°C to 85°C operating temperature range
are assured by design, characterization and correlation with statistical
process controls. The LTC1772BI is guaranteed to meet specifi cations over
the full –40°C to 85°C operating temperature range.
FB
Input Current
CONDITIONS
(Note 5)
Measured at V
V
V
C
C
(Note 6)
FB
FB
LOAD
LOAD
= 0.8V
= 0V
= 3000pF
= 3000pF
FB
A
= 25°C. V
The
l
IN
denotes the specifi cations which apply over the full operating
= 4.2V unless otherwise specifi ed. (Note 2)
Note 3: T
dissipation P
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC1772B is tested in a feedback loop that servos V
output of the error amplifi er.
Note 6: Peak current sense voltage is reduced dependent on duty cycle to
a percentage of value as given in Figure 2.
T
J
= T
J
A
is calculated from the ambient temperature T
+ (P
D
according to the following formula:
D
• θ
JA
°C/W)
0.820
MIN
500
0.860
TYP
550
120
105
10
20
40
40
LTC1772B
0.895
A
MAX
650
50
and power
FB
to the
UNITS
1772bfa
3
kHz
kHz
mV
mV
nA
ns
ns
V