LTC1911-1.5 Datasheet, PDF (2/12 Pages) Linear Technology – Low Noise, High Efficiency, Inductorless Step-Down DC/DC Converter

LTC1911-1.5/LTC1911-1.8
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN to GND ...................................................– 0.3V to 6V
SS/SHDN to GND ........................ – 0.3V to (V_IN + 0.3V)
V_OUT Short-Circuit Duration ............................ Indefinite
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 40°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
CV2^IN+
1
2
C2^– 3
GND 4
8 SS/SHDN
7 C1⁺
6
5
VC1_O–UT
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T_JMAX = 125°C, θ_JA = 160°C/ W
ORDER PART
NUMBER
LTC1911EMS8-1.5
LTC1911EMS8-1.8
MS8 PART MARKING
LTMY
LTNU
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS _{The q denotes specifications which apply over the full operating}
temperature range, otherwise specifications are T_A = 25°C. V_IN = 3.6V, C1 = 1µF, C2 = 1µF, C_IN = 10µF, C_OUT = 10µF unless
otherwise noted.
PARAMETER
V_IN Operating Voltage
V_OUT
V_IN Operating Current
V_IN Shutdown Current
Output Ripple
V_OUT Short-Circuit Current
Switching Frequency
SS/SHDN Input Threshold
SS/SHDN Soft-Start Current
Turn-On Time
Load Regulation
Line Regulation
CONDITIONS
MIN TYP MAX UNITS
q 2.7
5.5
V
LTC1911-1.5, 0mA ≤ I_OUT ≤ 250mA, V_IN = 2.7V to 5.5V q 1.44
1.5
1.56
V
LTC1911-1.8, 0mA ≤ I_OUT ≤ 250mA, V_IN = 2.7V to 5.5V q 1.73
1.8
1.87
V
I_OUT = 0mA, V_IN = 2.7V to 5.5V
q
180 350
µA
SS/SHDN = 0V, V_IN = 2.7V to 5.5V
q
10
20
µA
I_OUT = 10mA
I_OUT = 250mA
5
mV_P-P
12
mV_P-P
V_OUT = 0V
600
mA
Oscillator Free Running
1.2
1.5
1.8
MHz
q 0.3
0.6
1
V
V_SS/SHDN = 0V (Note 3)
V_SS/SHDN = V_IN
C_SS = 0pF, V_IN = 3.3V
C_SS = 10nF, V_IN = 3.3V
0V ≤ I_OUT ≤ 250mA
0V ≤ I_OUT ≤ 250mA
q –5
–2
–1
µA
0.01
µA
0.03
ms
10
ms
0.13
mV/mA
0.3
%/V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1911E is guaranteed to meet specified performance 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.
Note 3: Currents flowing into the device are positive polarity. Currents
flowing out of the device are negative polarity.
1911f
2