LM5574MT/NOPB National Semiconductor, LM5574MT/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM5574MT/NOPB
• Description: IC BUCK SYNC ADJ .5A 16TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®, SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM5574MT/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 70 V
• Current - Output: 500mA
• Frequency - Switching: 200kHz, 485kHz
• Voltage - Input: 6 ~ 75 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Power - Output: 700mW
• Current, Input Bias: 3.7 mA
• Current, Input Offset: 50 μA
• Current, Output: 0.5 A
• Frequency, Oscillator: 200/485 kHz
• Package Type: TSSOP
• Regulator Type: Buck (Step-Down), Switching
• Resistance, Thermal, Junction To Case: 30 °C/W
• Temperature, Operating, Range: -40 to +125 °C
• Voltage, Input: 6 to 75 V
• Voltage, Offset: 0.7 V (COMP to PWM Comparator)
• Voltage, Output: 7.15 V
• Dc To Dc Converter Type: Step Down
• Pin Count: 16
• Input Voltage: 75V
• Output Voltage: 1.225 to 70V
• Switching Freq: 50 TO 500KHz
• Output Current: 500mA
• Efficiency: 85%
• Output Type: Adjustable
• Switching Regulator: Yes
• Mounting: Surface Mount
• Input Voltage (min): 6V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• For Use With: LM5574BLDT - WEBENCH BUILD IT BOARD LM5574LM5574EVAL - BOARD EVALUATION FOR LM5574
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM5574MT; *LM5574MT/NOPB; LM5574MT

STARTUP REGULATOR
VCC SUPPLY
SHUTDOWN THRESHOLDS
SWITCH CHARACTERSICS
CURRENT LIMIT
SOFT-START
OSCILLATOR
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
BST to GND
PRE to GND
SW to GND (Steady State)
BST to V
SD, V
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
76V
90V
76V
-1.5V
76V
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
= 48V, R
T
T
4
= 11kΩ
= 11kΩ
Conditions
V
Operation Junction Temperature
BST to SW
OUT to GND
SYNC, SS, FB, RAMP to GND
ESD Rating (Note 2)
Storage Temperature Range
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
0.6
J
15
7
= 25°C, and those with boldface type
1.225
7.15
5.35
0.35
0.56
Typ
750
250
200
485
110
3.7
0.7
0.1
0.1
0.7
1.3
(Note 1)
25
57
70
75
10
11
9
5
4
1500
−40°C to + 125°C
Max
7.45
5.67
1.28
14V
Limited to Vin
7V
2kV
-65°C to +150°C
220
545
4.5
0.9
0.8
85
14
6V to 75V
Units
kHz
kHz
kHz
mΩ
mA
mA
µA
µA
µA
kΩ
ns
ns
ns
Ω
Ω
V
V
V
V
V
V
V
V
V
V
A
V