Analog Devices Linear ADI Power LTM4681 Manual page 6

LTM4681
ELECTRICAL CHARACTERISTICS
operating temperature range (Note 2). Specified as each individual output channel (Note 4). T
RUNP = 0, FREQUENCY_SWITCH = 350kHz and V
EEPROM settings and per Test Circuit 1, unless otherwise noted.
SYMBOL PARAMETER
t Settling Time for Dynamic Load Step
SETTLE
per Channel
I Output Current Limit, Peak High
OUTn(OCL_PK)
Range per Channel
I Output Current Limit, Time Averaged
OUTn(OCL_AVG)
per Channel
Control Section
V Channel 0–3 Feedback Input
FBCMn
Common Mode Range
V Full-Scale Command Voltage, Range
OUT-RNGL
Low (0.5V to 2.75V, Note 15) per
Channel
V Full-Scale Command Voltage, Range
OUT-RNGH
High (0.5V to 3.6V, Note 15) per
Channel
+ +
R V Impedance to SGND
VSNSn OSNSn
t Minimum On-Time
ON(MIN)
R Resolution
COMPn
Compensation Resistor R
Compensation Resistor R
g Resolution
mn
Error Amplifier g
Error Amplifier g
LSB Step Size
Analog OV/UV (Overvoltage/Undervoltage) Output Voltage Supervisor Comparators (VOUT_OV/UV_FAULT_LIMIT and VOUT_OV/UV_WARN_LIMIT Monitors)
N Resolution, Output Voltage
OV/UV_COMP
Supervisors
V Output OV Comparator Threshold
OV-RNG
Detection Range
V Output OV and UV Comparator
OUSTP
Threshold Programming LSB Step
Size
V Output OV Comparator Threshold
OV-ACC-n
Accuracy Channel 0 – 3
(See Note 14)
V Output UV Comparator Threshold
UV-RNGn
Detection Range
V Output UV Comparator Threshold
UV-ACCn
Accuracy Channel 0 – 3
(See Note 14)
6
The
commanded to 1.000V unless otherwise noted. Configured with factory-default
OUTn
CONDITIONS
Load: 10A to 20A and 20A to 10A at 10A/µs,
V = 1.2V, V
OUTn
Cycle-by-Cycle Inductor Peak Current Limit Inception,
Utilizing MFR_PWM_MODE[7] = 1, Using ~I
IOUT_OC_FAULT_LIMIT, Page 98
Time-Averaged Output Inductor Current Limit Inception
Threshold, Commanded by IOUT_OC_FAULT_LIMIT
(Note 12)
Utilizing MFR_PWM_MODE[7] = 1, Using ~I
Page 98
–
V Valid Input Range (Referred to SGND)
OSNSn
+
V Valid Input Range (Referred to SGND)
OSNSn
V Commanded to 2.750V, MFR_PWM_MODEn[1] = 1b
OUTn
Set Point Accuracy
Resolution
LSB Step Size
V Commanded to 3.6V, MFR_PWM_MODEn[1] = 0b
OUTn
Limit Design to 3.6V Operating for Module
Set Point Accuracy
Resolution
LSB Step Size
0.05V ≤ V
VOSNSn
(Note 8 ) per Channel
MFR_PWM_CONFIG[4:0] = 0 to 31 (See Figure 1, Note
Section)
TH(MAX)
TH(MIN)
COMPn = 1.35V, MFR_PWM_CONFIG[7:5] = 0 to 7
m(MAX)
m(MIN)
(Notes 14, 15)
High Range Scale, MFR_PWM_MODEn[1] = 0b
Low Range Scale, MFR_PWM_MODEn[1] = 1b
(Note 15)
High Range Scale, MFR_PWM_MODEn[1] = 0b
Low Range Scale, MFR_PWM_MODEn[1] = 1b
1V ≤ V
VOSNSn
0.5V ≤ V
VOSNSn
2.0V ≤ V
VOSNSn
High Range Scale, MFR_PWM_MODEn[1] = 0b
Low Range Scale, MFR_PWM_MODEn[1] = 1b
1V ≤ V
VOSNSn
0.5V ≤ V
VOSNSn
2.0V ≤ V
VOSNSn
For more information
denotes the specifications which apply over the specified internal
l
= 12V (Note 12) See Transient Graphs
IN
OUT
OUT
+
– V ≤ 3.3V
SGND
+ –
– V ≤ 2.7V, MFR_PWM_MODE[1] = 1b
VOSNSn
+ –
– V ≤ 1V, MFR_PWM_MODE[1] = 1b
VOSNSn
+ –
– V ≤ 3.6V, MFR_PWM_MODE[1] = 0b
VOSNSn
+ –
– V ≤ 2.7V, MFR_PWM_MODE[1] = 1b
VOSNSn
+ –
– V ≤ 1V, MFR_PWM_MODE[1] = 1b
VOSNSn
+ –
– V ≤ 3.6V, MFR_PWM_MODE[1] = 0b
VOSNSn
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= 25°C, V = 12V, RUNn = 3.3V,
A IN
MIN TYP
25
46
= 34A for
40; See I
O-RB-ACC
Specification (Output Current
n
Readback Accuracy)
= 40A,
–0.1
l
l
2.75
−0.5
12
0.688
3.6
−0.5
12
1.375
50
60
5
62
0.5
3
5.76
1
0.68
9
1
0.5
11.2
5.6
l
l
l
1
0.5
l
l
l
MAX UNITS
µs
A
0.3 V
3.6 V
V
+0.5 %
Bits
mV
V
+0.5 %
Bits
mV
kΩ
ns
Bits
kΩ
kΩ
Bits
mmho
mmho
mmho
Bits
3.6 V
2.7 V
mV
mV
±1.5 %
±2.5 %
±1.5 %
3.6 V
2.7 V
±1.5 %
±2.5 %
±1.5 %
Rev. A