Datasheet

LTM8001
3
8001fb
For more information www.linear.com/LTM8001
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. RUN = 3V unless otherwise noted (Note 3).
PARAMETER CONDITIONS MIN TYP MAX UNITS
Buck Regulator
Minimum V
IN0
Input Voltage
l
6 V
V
OUT0
Output DC Voltage 0A < I
OUT
≤ 3A, R
FB0
Open
0A < I
OUT
≤ 3A; R
FB0
= 536Ω
1.2
24
V
V
V
OUT0
Output DC Current 6V < V
IN0
< 36V, V
OUT
= 3.3V 0 5 A
Quiescent Current Into V
IN0
RUN = 0V
No Load
0.1
26
1
40
µA
mA
V
OUT0
Line Regulation 6V < V
IN0
< 36V, I
OUT
= 1A ±0.5 %
V
OUT0
Load Regulation V
IN0
= 24V, 0A < I
OUT
< 5A ±1.2 %
V
OUT0
RMS Voltage Ripple V
IN0
= 24V, I
OUT
= 5A 10 mV
Switching Frequency R
T
= 39.2k
R
T
= 200k
1000
200
kHz
kHz
Voltage at FB0 Pin
l
1.15 1.19 1.21 V
Internal FBO Resistor 10 kΩ
RUN Pin Current RUN = 1.45V 5.5 µA
RUN Threshold Voltage (Falling) 1.49 1.61 V
RUN Threshold Voltage (Rising) 1.63 1.75 V
ILIM Control Range 0 1.5 V
ILIM Pin Current 100 nA
ILIM Current Limit Accuracy ILIM = 1.5V
ILIM = 0.75V
5.1
2.5
6.4
3.4
A
A
V
REF
Voltage 0.5mA Load 1.9 2 2.1 V
SS Pin Current 11 µA
SYNC Input Low Threshold f
SYNC
= 500kHz 0.8 V
SYNC Input High Threshold f
SYNC
= 500kHz 1.2 V
SYNC Input Current SYNC = 0V
SYNC = 2V
–0.1
0.1
µA
µA
LDO Array
SET1-5 Pin Current BIAS123 = BIAS45 = 2V, SETx = 0V
, I
OUT1-5
= 1mA
l
9.85
9.80
10
10
10.15
10.20
µA
µA
V
OUTx
– SETx Offset Voltage BIAS123 = BIAS45 = 2V, SETx = 0V, I
OUT1-5
= 1mA
l
–4
–6.5
4
6.5
mV
mV
Line Regulation for SET Current 1V < V
OUT0
= V
IN45
< 22V, I
OUTx
= 1mA (Note 4)
l
11 nA
Line Regulation for V
OUT1-5
1V < V
OUT0
= V
IN45
< 22V, I
OUTx
= 1mA (Note 4) 0.25 mV
Load Regulation for SETx Current I
OUT1-5
= 1mA to 1.1A 25 nA
Load Regulation for V
OUT1-5
I
OUT1-5
= 1mA to 1.1A
l
34
52
mV
mV
Minimum Load Current for V
OUT1-5
(Note 4) V
OUT0
= V
IN45
= BIAS123 = BIAS45 = 10V
V
OUT0
= V
IN45
= BIAS123 = BIAS45 = 22V
l
l
500
1
µA
mA
BIAS123, BIAS45 Dropout Voltage I
OUT1-5
= 100mA
I
OUT1-5
= 1.1A
l
1.2
1.6
V
V
V
OUT0
to V
OUT1-3
and V
IN45
to V
OUT4-5
Dropout
Voltage
I
OUT1-5
= 100mA
I
OUT1-5
= 1.1A
l
100
500
mV
mV