LTC2970 Datasheet, PDF (8/36 Pages) Linear Technology – Dual I2C Power Supply Monitor and Margining Controller

LTC2970/LTC2970-1
TYPICAL PERFOR A CE CHARACTERISTICS
IDAC Output Current
vs Temperature
257.4
IDAC CODE = 'hff
R_IOUT = 13kΩ
257.2
257.0
256.8
256.6
256.4
256.2
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
29701 G10
Voltage Buffered IDAC Load
Regulation Sinking
0.35 _{VIOUT = 0.1V}
0.30
90oC
25oC
0.25
0.20
–45oC
0.15
0.10
0.05
0
0
2
4
6
8
10
CURRENT (mA)
29701 G13
Voltage Buffered IDAC Transient
Response During Transition from
On State to High-Z State
100k7 SERIES RESISTANCE ON VOUTn
RIOUT = 10k7
HIGH-Z
CONNECTED
8
10Ms PER DIVISION
29701 G16
V_OUTn Offset Voltage
vs Temperature
1.620
IDAC CODE = 'h00
1.615
1.610
1.605
1.600
1.595
1.590
–50 –25 0
25 50
TEMPERATURE (oC)
75 100
29701 G11
Voltage Buffered IDAC Load
Regulation Sourcing
3.500
3.498
25oC
–45oC
3.496
3.494
3.492
90oC
VIOUTn = 3.5V
3.490
0
–2
–4
–6
CURRENT (mA)
–8 –10
29701 G12
Voltage Buffered IDAC Transient
Response to 1LSB DAC Code Change
100k7 SERIES RESISTANCE ON VOUTn
RIOUT = 10k7
Voltage Buffered IDAC Soft-
Connect Transient Response
100k7 SERIES RESISTANCE ON VOUTn
RIOUT = 10k7
CODE 'h80
CODE 'h80
HIGH-Z
CODE 'h7f
CONNECTED
1Ms PER DIVISION
29701 G14
Temperature Sensor Error
vs Temperature
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–50 –25 0
25 50
TEMPERATURE (oC)
75 100
29701 G17
5Ms PER DIVISION
29701 G15
V_DD Regulator Output Voltage
vs Temperature
4.945
V12VIN = 12V
4.944 ^{IVDD = 0A}
4.943
4.942
4.941
4.940
4.939
4.938
–50 –25
0 25 50
TEMPERATURE (oC)
75 100
29701 G18
29701fc