lm27213mtd National Semiconductor Corporation, lm27213mtd Datasheet - Page 7

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

Drivers
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)
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the
device is guaranteed. For guaranteed performance limits and associated test conditions, see the Electrical Characteristics table. Functional temperature range is the
range within which the device performs its intended functions, but not necessarily meeting the limits specified in the Electrical Characteristic table.
Note 2: The maximum allowable power dissipation is calculated by using P
ambient temperature, and θ
and 80˚C/W for T
allows the safe dissipation of more power. The Absolute Maximum power dissipation should be de-rated by 12.5mW per ˚C above 25˚C ambient. The SQA rating
of 5.2W results from using 150˚C, 25˚C, and 24.2˚C/W for T
per ˚C above 25˚C ambient. The LM27213 actively limits its junction temperature to about 150˚C.
Note 3: For detailed information on soldering plastic small-outline packages, refer to the Packaging Databook available from National Semiconductor Corporation.
Note 4: For testing purposes, ESD was applied using the human-body model, a 100pF capacitor discharged through a 1.5kΩ resistor.
Note 5: All limits are guaranteed at room temperature (standard face type) and at temperature extremes (bold face type). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using Statistical Quality Control (SQC) methods. All limits are used to calculate
Average Outgoing Quality Level (AOQL).
Note 6: The SW pin can have -2V to -0.5 volts applied for a maximum duty cycle of 10% with a minimum frequency of 1Hz. There is no duty cycle or maximum
period limitation for a SW pin voltage range of -0.5V to 30 Volts.
Symbol
T
T
T
t
I
FALLHG
RISEHG
RISELG
FALLLG
T
qdriver
DLY
Driver Quiescent current
Top Driver pull-up current
Top Drive pull-up Rds_on
Top Drive pull-down current
Top Drive pull-down Rds_on
Top drive rise time
Top drive fall time
Bottom driver pull-up current
Bottom Drive pull-up Rds_on
Bottom Drive pull-down currrent
Bottom Drive pull-down Rds_on
Bottom Drive rise time
Bottom Drive fall time
Prop delay, CMP to top driver
JMAX
, T
A
, and θ
JA
is the junction-to-ambient thermal resistance of the specified package. The TSSOP rating of 1.56W results from using 150˚C, 25˚C,
JA
Parameter
respectively. The θ
Specifications with standard typeface are for T
JA
of 90˚C/W represents the worst-case condition with no heat sinking of the 48-Pin TSSOP. Heat sinking
JMAX
, T
A
, and θ
High drive = low, Low drive = high
V
V
I
V
I
C
C
V
I
V
I
C
C
CMP rising above CMPREF (20mV
overdrive) to HG dropping to VSW +
0.9 V
CBOOT
sw
CBOOT
sw
CBOOT
DVdd
DVdd
load
load
DVdd
DVdd
load
load
JA
Dmax
= I
= I
respectively. The Absolute Maximum power dissipation should be de-rated by 41mW
DVdd
= 3.3nF, (10% to 90%)
= 3.3nF, (10% to 90%)
= 3.3nF, (10% to 90%)
= 3.3nF, (10% to 90%)
HG
lG
= 5V, Load = 0.1Ω
= 5V, Load = 0.1Ω
= 5V, Load = 0.1Ω
= 5V, Load = 0.1Ω
= (T
7
= I
= I
= V
= 0.7A
= 0.7A
, C
HG
lG
JMAX
DVDD
load
= 0.7A
= 0.7A
Conditions
- T
= 3.3nF
A
= 5V
) /θ
JA
, where T
JMAX
J
is the maximum junction temperature, T
= 25˚C, and those in bold face
Min
Typ
-3.2
1.2
0.6
3.2
2.9
3.2
0.6
14
17
12
17
14
89
3
Max
100
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A
is the
Units
µA
ns
ns
ns
ns
ns
A
Ω
A
Ω
A
Ω
A
Ω