LM2670SX-12/NOPB National Semiconductor, LM2670SX-12/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM2670SX-12/NOPB
• Description: IC REG SW 12V 3A STP DN TO-263-7
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2670SX-12/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 12V
• Current - Output: 3A
• Frequency - Switching: 260kHz
• Voltage - Input: 8 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (7 leads + tab)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2670SX-12; *LM2670SX-12/NOPB; LM2670SX-12

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DEVICE PARAMETERS
I
I
I
I
R
f
D
I
V
I
F
V
θ
θ
θ
θ
θ
θ
θ
θ
θ
Symbol
Q
STBY
CL
L
O
BIAS
ON/OFF
SYNC
JA
JA
JC
JA
JA
JA
JC
JA
JA
ON/OFF
SYNC
DS(ON)
All Output Voltage Versions
Electrical Characteristics
Limits appearing in bold type face apply over the entire junction temperature range of operation, −40°C to 125°C.
Specifications appearing in normal type apply for T
justable versions and V
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings indicate conditions under which of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test condition, see the electrical
Characteristics tables.
Quiescent Current V
Standby Quiescent
Current
Current Limit
Output Leakage
Current
Switch On-
Resistance
Oscillator
Frequency
Duty Cycle
Feedback Bias
Current
ON/OFF
Threshold Voltage
ON/OFF Input
Current
Synchronization
Frequency
SYNC Threshold
Voltage
Thermal
Resistance
Parameter
IN
=24V for the 12V version, Sync pin open circuited..
For 3.3V, 5.0V, and ADJ Versions
V
For 12V Versions
ON/OFF Pin = 0V
V
V
V
I
Measured at Switch Pin
Maximum Duty Cycle
Minimum Duty Cycle
V
ADJ Version Only
ON/OFF Input = 0V
V
T Package, Junction to Ambient
(Note 5)
T Package, Junction to Ambient
(Note 6)
T Package, Junction to Case
S Package, Junction to Ambient
(Note 7)
S Package, Junction to Ambient
(Note 8)
S Package, Junction to Ambient
(Note 9)
S Package, Junction to Case
SD Package, Junction to Ambient
(Note 10)
SD Package, Junction to Ambient
(Note 11)
SWITCH
FEEDBACK
FEEDBACK
IN
SWITCH
SWITCH
FEEDBACK
SYNC
= 40V, ON/OFF Pin = 0V
(Pin 5)=3.5V, 50% Duty Cycle
= 3A
= 0V
= −1V
= 8V
= 15V
= 1.3V
Conditions
A
= T
J
= 25°C. Unless otherwise specified V
4
0.15
Typ
260
400
4.2
4.5
1.4
1.4
50
16
91
85
20
65
45
56
35
26
55
29
0
2
2
IN
=12V for the 3.3V, 5V and Ad-
3.8/3.6
Min
225
0.8
0.17/0.29
100/150
5.25/5.4
Max
200
280
2.0
15
45
6
Units
°C/W
°C/W
KHz
kHz
mA
mA
μA
μA
nA
μA
++
%
%
Ω
A
V
V