DC1261A Linear Technology, DC1261A Datasheet - Page 3
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DC1261A
Manufacturer Part Number
DC1261A
Description
BOARD DEMO LTM8022
Manufacturer
Linear Technology
Series
µModuler
Specifications of DC1261A
Design Resources
LTM8022 Spice Model LTM8022 Gerber Files DC1261 Design File DC1261 Schematic
Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Power - Output
-
Voltage - Output
3.3V
Current - Output
1A
Voltage - Input
4.5 ~ 36 V
Regulator Topology
Buck
Frequency - Switching
600kHz
Board Type
Fully Populated
Utilized Ic / Part
LTM8022
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
ELECTRICAL CHARACTERISTICS
erature range, otherwise specifi cations are at T
unless otherwise specifi ed. (Note 2)
SYMBOL
V
V
R
I
IQ
IQ
ΔV
ΔV
V
f
I
V
V
I
I
V
V
V
I
I
V
V
I
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 LTM8022E is guaranteed to meet performance specifi cations
from 0°C to 85°C ambient. Specifi cations over the full –40°C to
85°C ambient operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM8022I is guaranteed to meet specifi cations over the full –40°C to 85°C
ambient operating temperature range. The LTM8022MP is guaranteed to
OUT(MAX)
SW
SC(OUT)
ADJ
RUN/SS
PGO
PG(SINK)
SYNC(BIAS)
ADJ
IN
OUT
OUT(AC_RMS)
BIAS(MIN)
IH(RUN/SS)
IL(RUN/SS)
PG(TH)
SYNC(IL)
SYNC(IH)
ADJ(MIN)
VIN
BIAS
OUT
OUT
/V
/V
OUT
OUT
PARAMETER
Input DC Voltage
Output DC Voltage
Minimum Allowable R
Continuous Output DC Current
V
BIAS Quiescent Current
Line Regulation
Load Regulation
Output Ripple (RMS)
Switching Frequency
Output Short-Circuit Current
Voltage at ADJ Pin
Minimum BIAS Voltage for Proper Operation
Current Out of ADJ Pin
RUN/SS Pin Current
RUN/SS Input High Voltage
RUN/SS Input Low Voltage
PG Threshold
PG Leakage
PG Sink Current
SYNC Low Threshold
SYNC High Threshold
SYNC Pin Bias Current
IN
Quiescent Current
ADJ
A
= 25°C. V
CONDITIONS
0V < I
0V < I
(Note 3)
4V < V
V
V
V
V
V
V
V
V
3.6V < V
V
C
V
C
R
V
C
ADJ = 1V, C
V
C
C
V
V
V
f
f
V
SYNC
SYNC
RUN/SS
BIAS
BIAS
BIAS
RUN/SS
BIAS
BIAS
BIAS
IN
OUT
IN
OUT
T
IN
OUT
RUN/SS
OUT
OUT
FB
PG
PG
SYNC
IN
= 113kΩ, C
The
= 24V, 0V < I
= 24V, I
= 36V, V
Rising
= 30V
= 0.4V
= 51μF
= 51μF
= 51μF
= 51μF
= 51μF
= 10V, V
OUT
OUT
= 550kHz, C
= 550kHz, C
= 3V, Not Switching, R
= 3V, Not Switching, R
= 0V, Not Switching, R
= 3V, Not Switching, R
= 3V, Not Switching, R
= 0V, Not Switching, R
IN
= 0V
l
IN
= 0.2V, R
= 0.2V, R
= 2.5V
< 36V, C
< 1A, R
< 1A, R
denotes the specifi cations which apply over the full operating temp-
< 36V, I
OUT
OUT
OUT
OUT
RUN/SS
= 1A, V
= 51μF
meet specifi cations over the full –55°C to 125°C temperature range. Note
that the maximum internal temperature is determined by specifi c operating
conditions in conjunction with board layout, the rated package thermal
resistance and other environmental factors.
Note 3: Guaranteed by design.
Note 4: C
electrolytic.
Note 5: Short circuit current at V
and correlation. 100% tested at V
= 0V (Note 5)
OUT
T
ADJ
ADJ
OUT
T
OUT
OUT
OUT
= 51μF
= 174k
= 174k
< 1A, V
Open
= 43.2k
= 51μF (Note 4)
= 51μF
= 51μF
= 1A, V
OUT
= 10V, V
OUT
= 3.3V,
OUT
T
T
T
T
T
T
= 51μF is composed of a 4.7μF ceramic capacitor and a 47μF
= 174k (E, I)
= 174k (MP)
= 174k
OUT
= 174k (E, I)
= 174k (MP)
= 174k
BIAS
= 3.3V,
= 3.3V
= 3V, R
T
l
l
l
l
l
l
= 60.4kΩ, C
IN
IN
= 36V is guaranteed by characterization
= 10V.
MIN
42.2
765
200
3.6
2.5
0.5
0
IN
0.03
TYP
325
790
730
800
= 2.2μF , C
0.8
0.1
0.1
0.4
1.9
0.1
0.1
10
25
25
85
50
50
10
1
3
2
5
LTM8022
MAX
350
120
120
200
805
0.5
0.5
2.4
0.2
0.7
OUT
36
60
10
1
5
1
= 4.7μF ,
UNITS
8022fd
3
kHz
mV
mV
mV
kΩ
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
%
%
V
V
V
A
A
V
V
V
V
V