lm27213mtd National Semiconductor Corporation, lm27213mtd Datasheet - Page 6

• Manufacturer Part Number: lm27213mtd
• Description: Single Phase Hysteretic Buck Controller
• Manufacturer: National Semiconductor Corporation

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