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LM27213MTD Fiches technique(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce LM27213MTD
Description  Single Phase Hysteretic Buck Controller
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM27213MTD Fiches technique(HTML) 6 Page - National Semiconductor (TI)

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Electrical Characteristics Specifications with standard typeface are for T
J = 25˚C, and those in bold face
type apply over a junction temperature range of -5˚C to +110˚C. Unless otherwise specified, VDD = 5V, SGND = DGND =
PGND = SRCK = 0V, unless otherwise stated. (Note 5) (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
dac
DAC Accuracy
Measured at VREF pin
%
DAC codes from 0.7V to 0.828V
-1.3
1.3
DAC codes from 0.844V to 1.004V
-1.1
1.1
DAC codes from 1.020V to 1.196V
-0.9
0.9
DAC codes from 1.212V to 1.356V
-1
1
DAC codes from 1.372V to 1.500V
-1.1
1.1
DAC codes from 1.516V to 1.708V
-1.3
1.3
V1R7
V1R7 Accuracy
17k
Ω from V1R7 to GND
-1.674
1.708
1.742
V
VSTP Offset
VSTP = 1.398V, Measured at VREF
pin
-5
5
mV
VBOOT Offset
VBOOT = 1.00V, Measured at VREF
pin
-5
5
mV
VSLP Offset
VSLP = 0.748V, Measured at VREF pin
-5
5
mV
I
VREF
VREF Driving Capability
source
1.3
mA
sink
12.6
mA
I
VDAC
VDAC Driving Capability
source
1.3
mA
sink
13.4
mA
I
V1R7
V1R7 Driving Capability
source
90
549
µA
Error Comparator
I
BEC
Error Comparator Input Bias Current
(Sourcing)
CMP = 1.436V.
12
21
33
µA
V
OSEC
Error Comparator Input Offset Voltage
CMPREF = 1.436V.
-3
3
mV
I
HYST
Hysteresis Current (bi-directional)
R
hys = 17kW
38
50
68
µA
R
hys = 170kW
5
µA
Current Limit
I
BCLC
Current Limit Comparator Input Bias
Current
9
21
35
µA
V
OSCLC
Current Limit Comparator Input Offset
Voltage
ILIMREF = 1.436V.
-2
2
mV
Current Limit Setting Current
R
hys = 17kW, ILIMREF < ILIMx
280
337
395
µA
R
hys = 17kW, ILIMREF > ILIMx
250
µA
R
hys = 170kW, ILIMREF < ILIMx
30
µA
Time Delays
t
BOOT
VBOOT Voltage Holdup Time
From assertion of XPOK to assertion of
CLK_EN#.
10
17
30
µs
t
CPU_PWRGD
Power Good Mask For Initial VID
Voltage Settling
From assertion of CLK_EN# to
assertion of PGOOD.
3
5
9
ms
t
MASK
Power Good Mask For VID Changes
100
129
179
µs
t
dPG
Power Good De-assertion Delay Upon
Shutdown
Delay From VR_ON de-assertion to
PGOOD de-assertion
60
ns
Over-voltage Protection
V
TRIP
SENSE Voltage As A Percentage of
VOVP
VOVP = V1R7
109
125
139
%
System
DE_EN#
LH
DE_EN# Input Logic High
0.63
0.56
V
DE_EN#
LL
DE_EN# Input Logic Low
0.47
0.315
V
I
DE_EN#
DE_EN# Pin Leakage Current
DE_EN# = 7.5V
6
100
µA
V
SDT
Soft Shutdown Finish Threshold
Low-side driver enabled after shutdown
0.3
V
www.national.com
6


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