LM2642MTC/NOPB National Semiconductor, LM2642MTC/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM2642MTC/NOPB
• Description: IC CTRLR SW SYNC STPDN 28TSSOP
• Manufacturer: National Semiconductor

Specifications of LM2642MTC/NOPB

• Applications: Embedded systems, Console/Set-Top boxes
• Current - Supply: 1mA
• Voltage - Supply: 4.5 V ~ 30 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP
• Dc To Dc Converter Type: Synchronous Step Down Controller
• Number Of Outputs: 2
• Pin Count: 28
• Input Voltage: 4.5 to 30V
• Output Voltage: 1.3 to 30V
• Output Current: 20A
• Package Type: TSSOP
• Mounting: Surface Mount
• Operating Temperature Classification: Automotive
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Primary Input Voltage: 30V
• No. Of Outputs: 1
• No. Of Pins: 28
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 3 - 168 Hours
• Control Mode: Current
• Rohs Compliant: Yes
• For Use With: LM2642REVD EVAL - BOARD EVALUATION LM2642
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM2642MTC; *LM2642MTC/NOPB; LM2642MTC

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System
∆V
∆V
V
I
VLIN5
V
I
I
I
I
I
V
V
V
I
VIN
CL
ss_SC1
ss_SC2
ss_SK1
ss_SK2
sc_uvdelay
FB1_FI2
CLos
ON_SS1
ON_SS2
SSTO
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Unless otherwise specified, V
over the specified operating junction temperature range, (-20˚C to +125˚C, if not otherwise specified). Specifications appearing
in plain type are measured using low duty cycle pulse testing with T
by design, test, or statistical analysis.
Voltages from the indicated pins to SGND/PGND:
VIN, ILIM1, ILIM2, KS1, KS2
SW1, SW2, RSNS1, RSNS2
FB1, FB2, VDD1, VDD2
PGOOD, COMP1, COMP2, UV
Delay
ON/SS1, ON/SS2 (Note 2)
CBOOT1 to SW1, CBOOT2 to SW2
LDRV1, LDRV2
HDRV1 to SW1, HDRV2 to SW2
HDRV1 to CBOOT1, HDRV2 to
CBOOT2
Symbol
OUT
OUT
/V
/V
,
,
,
OUT
OUT
Load Regulation
Line Regulation
Feedback Voltage
Input Supply Current
VLIN5 Output Voltage
(Note 9)
Current Limit
Comparator Offset
(VILIMX −VRSNSX)
Current Limit Sink
Current
Soft-Start Source
Current
Soft-Start Sink Current
Soft-Start On Threshold
Soft-Start Timeout
Threshold
UV_DELAY Source
Current
Parameter
IN
= 15V, GND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in boldface type apply
VIN = 15V, V
5.5V ≤ VIN ≤ 30V, V
5.5V ≤ VIN ≤ 30V
0˚C to 125˚C
-40˚C to 125˚C
V
5.5V ≤ VIN ≤ 30V
Shutdown (Note 8)
V
IVLIN5 = 0 to 25mA,
5.5V ≤ VIN ≤ 30V
-40˚C to 125˚C
-40˚C to 125˚C
V
V
(Note 10)
UV-DELAY = 2V
−0.3V to (VLIN5
−0.3V to (VLIN5
ON_SSx
ON_SS1
ON_ss1
ON_ss1
−0.3 to (V
−0.3V to 32V
(VDD+0.3)V
−0.3V to 6V
−0.3V to 7V
(Note 1)
= V
= V
>
−0.3V to
= V
+0.3)V
+0.6)V
2V
−0.3V
+0.3V
ON_ss2
ON_ss2
0.3)V
ON_SS2
compx
Conditions
IN
+
= 0.5V to 1.5V
= 1.5V (on)
= 2V
= 0V
compx
4
Operating Ratings
=1.25V
Power Dissipation (T
(Note 3)
Ambient Storage Temperature
Range
Soldering Dwell Time, Temperature
(Note 4)
ESD Rating (Note 5)
VIN (VLIN5 tied to VIN)
VIN (VIN and VLIN5 separate)
Junction Temperature
A
Wave
Infrared
Vapor Phase
= 25˚C (Note 6), (Note 7). Min/Max limits are guaranteed
1.215
1.217
1.212
4.70
4.68
8.67
Min
0.5
0.7
9
2
2
A
= 25˚C),
1.238
(Note 1)
0.04
0.04
1.12
Typ
1.0
5.2
3.3
±
37
10
5
2
5
2
−65˚C to +150˚C
−40˚C to +125˚C
1.260
1.259
1.261
±
Max
5.30
5.30
110
2.0
5.0
1.4
11
11
10
7.0
9
10sec, 240˚C
75sec, 219˚C
4 sec, 260˚C
4.5V to 5.5V
5.5V to 30V
1.1W
Units
2kV
mA
mV
µA
µA
µA
µA
µA
%
%
V
V
V
V