LM25576MH/NOPB National Semiconductor, LM25576MH/NOPB Datasheet - Page 5

• Manufacturer Part Number: LM25576MH/NOPB
• Description: IC BUCK SYNC ADJ 3A 20TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®, SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM25576MH/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 40 V
• Current - Output: 3A
• Frequency - Switching: 200kHz, 485kHz
• Voltage - Input: 6 ~ 42 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Power - Output: 4.2W
• Current, Input Bias: 3.4 mA
• Current, Output: 3 A
• Frequency, Oscillator: 50 kHz to 1 MHz
• Package Type: TSSOP-20EP
• Power Dissipation: 1.9 W
• Regulator Type: Buck, Switching
• Resistance, Thermal, Junction To Case: 6 °C/W
• Temperature, Operating, Range: -40 to +125 °C
• Voltage, Gain: 70 dB
• Voltage, Input: 6 to 42 V
• Voltage, Offset: 0.7 V
• Voltage, Output: 7.15 V
• Primary Input Voltage: 42V
• No. Of Outputs: 1
• Output Voltage: 7.45V
• Output Current: 3A
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Filter Terminals: SMD
• Rohs Compliant: Yes
• For Use With: LM25576BLDT - WEBENCH BUILD IT BOARD LM25576LM25576EVAL - BOARD EVALUATION FOR LM25576
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM25576MH; *LM25576MH/NOPB; LM25576MH

STARTUP REGULATOR
VCC SUPPLY
SHUTDOWN THRESHOLDS
SWITCH CHARACTERSICS
CURRENT LIMIT
SOFT-START
OSCILLATOR
V
BST to GND
PRE to GND
SW to GND (Steady State)
BST to V
SD, V
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
apply over full Operating Junction Temperature range. V
IN
Symbol
VccReg
to GND
CC
to GND
CC
Vcc Regulator Output
Vcc LDO Mode turn-off
Vcc Current Limit
Vcc UVLO Threshold
Vcc Undervoltage Hysteresis
Bias Current (Iin)
Shutdown Current (Iin)
Shutdown Threshold
Shutdown Hysteresis
Standby Threshold
Standby Hysteresis
SD Pull-up Current Source
Buck Switch Rds(on)
BOOST UVLO
BOOST UVLO Hysteresis
Pre-charge Switch Rds(on)
Pre-charge Switch on-time
Cycle by Cycle Current Limit
Cycle by Cycle Current Limit Delay
SS Current Source
Frequency1
Frequency2
SYNC Source Impedance
SYNC Sink Impedance
SYNC Threshold (falling)
SYNC Frequency
SYNC Pulse Width Minimum
Parameter
45V
60V
45V
-1.5V
45V
14V
Specifications with standard typeface are for T
(Note 1)
IN
Vcc = 0V
(Vcc increasing)
FB = 1.3V
SD = 0V
(SD Increasing)
(Standby Increasing)
RAMP = 0V
RAMP = 2.5V
R
R
= 24V, R
T
T
5
= 11kΩ
= 11kΩ
Conditions
BST to SW
OUT to GND
SYNC, SS, FB, RAMP to GND
ESD Rating (Note 2)
Storage Temperature Range
V
Operation Junction Temperature
Operating Ratings
IN
Human Body Model
T
= 32.4kΩ unless otherwise stated. (Note 3)
6.85
5.03
0.47
1.17
Min
180
425
550
3.6
J
15
7
= 25°C, and those with boldface type
1.225
7.15
5.35
0.25
0.56
Typ
170
265
100
200
485
110
3.4
0.7
0.1
0.1
3.8
4.2
1.3
(Note 1)
25
48
70
10
11
9
5
−40°C to + 125°C
Max
7.45
5.67
1.28
14V
Limited to Vin
7V
2kV
-65°C to +150°C
340
220
545
4.5
0.9
5.1
70
14
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6V to 42V
Units
kHz
kHz
kHz
mΩ
mA
mA
kΩ
µA
µA
µA
ns
ns
ns
Ω
Ω
V
V
V
V
V
V
V
V
V
V
A
V