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LTM4700
ELECTRICAL CHARACTERISTICS
operating temperature range (Note 2). Specified as each individual output channel (Note 4). T
FREQUENCY_SWITCH = 350kHz and V
settings and per Test Circuit 1, unless otherwise noted.
SYMBOL
PARAMETER
t
Settling Time for Dynamic Load
SETTLE
Step
I
Output Current Limit, Peak High
OUTn(OCL_PK)
Range
I
Output Current Limit, Time
OUTn(OCL_AVG)
Averaged
Control Section
V
Channel 0 Feedback Input Common
FBCM0
Mode Range
V
Channel 1 Feedback Input Common
FBCM1
Mode Range
V
Full-Scale Command Voltage,
OUT-RNGL
Range Low (0.6V to 2.75V, Notes
7, 15)
+
+
R
V
Impedance to SGND
VSNS0
OSNS0
+
R
V
Impedance to SGND
VSNS1
OSNS1
t
Minimum On-Time
ON(MIN)
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
Full-Scale Command Voltage,
OUT-RNGH
Range Low (0.6V to 3.6V, Notes
7, 15)
g
Resolution
m0,1
Error Amplifier g
Error Amplifier g
LSB Step Size
R
Resolution
COMP0,1
Compensation Resistor R
Compensation Resistor R
V
Output OV Comparator Threshold
OV-ACC-0,1
Accuracy Channel 0 and 1
(See Note 14)
V
Output UV Comparator Threshold
UV-RNG
Detection Range (Note 15)
6
The
commanded to 1.000V unless otherwise noted. Configured with factory-default EEPROM
OUTn
CONDITIONS
Load: 0A to 12.5A and 12.5A to 0A at 10A/µs,
V
= 1V, V
OUTn
Cycle-by-Cycle Inductor Peak Current Limit Inception,
Utilizing MFR_PWM_MODE[7] = 1, Using ~I
Page 89
Time-Averaged Output Inductor Current Limit Inception
Threshold, Commanded by IOUT_OC_FAULT_LIMIT
12)
Utilizing MFR_PWM_MODE[7] = 1, Using ~I
Page 89
–
V
Valid Input Range (Referred to SGND)
OSNS0
+
V
Valid Input Range (Referred to SGND)
OSNS0
–
V
Valid Input Range (Referred to GND)
OSNS1
+
V
Valid Input Range (Referred to SGND)
OSNS1
V
Commanded to 2.750V, MFR_PWM_MODEn[1] = 1b
OUTn
Set Point Accuracy
Resolution
LSB Step Size
0.05V ≤ V
VOSNS0
0.05V ≤ V
VOSNS1
(Note 8 )
(Notes 14, 15)
(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
V
Commanded to 3.6V, MFR_PWM_MODEn[0] = 1b
OUTn
Set Point Accuracy
Resolution
LSB Step Size
COMP0,1 = 1.35V, MFR_PWM_CONFIG[7:5] = 0 to 7
m(MAX)
m(MIN)
MFR_PWM_CONFIG[4:0] = 0 to 31 (See Figure 1, Note
Section)
TH(MAX)
TH(MIN)
1V ≤ V
VOSNS0
0.5V ≤ V
VOSNS0
1V ≤ V
VOSNS1
0.5V ≤ V
VOSNS1
High Range Scale, MFR_PWM_MODEn[1] = 0b
Low Range Scale, MFR_PWM_MODEn[1] = 1b
For more information
denotes the specifications which apply over the specified internal
l
= 12V (Note 12)
IN
OUT
OUT
+
– V
≤ 1.8V
SGND
– V
≤ 1.8V
SGND
+
–
– V
≤ 1.8V, MFR_PWM_MODE0[1] = 1b
VOSNS0
+
–
– V
< 1V, MFR_PWM_MODE0[1] = 1b
VOSNS0
+
–
– V
≤ 1.8V, MFR_PWM_MODE1[1] = 1b
VOSNS1
+
–
– V
< 1V, MFR_PWM_MODE1[1] = 1b
VOSNS1
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= 25°C, V
= 12V, RUNn = 3.3V,
A
IN
MIN
TYP
50
60
= 50A,
52A; See I
(Note
Specification (Output Current
n
Readback Accuracy)
= 50A,
–0.1
l
l
–0.3
l
l
2.7
−0.5
12
0.688
50
50
60
9
1
0.5
11.2
5.6
3.4
–0.5
12
1.375
3
5.76
1
0.68
5
62
0
l
l
l
l
1
0.5
MAX
UNITS
µs
A
O-RB-ACC
0.3
V
3.6
V
0.3
V
3.6
V
2.8
V
−0.5
%
Bits
mV
kΩ
kΩ
ns
Bits
3.6
V
2.7
V
mV
mV
3.6
V
–0.5
%
Bits
mV
Bits
mmho
mmho
mmho
Bits
kΩ
kΩ
±1.5
%
±30
mV
±1.5
%
±30
mV
3.6
V
2.7
V
Rev. B
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