LM25007MMX Datasheet, PDF (5/19 Pages) Texas Instruments – LM25007 42V, 0.5A Step-Down Switching Regulator

LM25007
www.ti.com
SNVS401C – JANUARY 2006 – REVISED FEBRUARY 2013
Electrical Characteristics⁽¹⁾
Specifications with standard type are for T_J = 25°C only; limits in boldface type apply over the full Operating Junction
Temperature (T_J) range. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical
values represent the most likely parametric norm at T_J = 25°C, and are provided for reference purposes only. Unless
otherwise stated the following conditions apply: V_IN = 24V, R_ON = 200kΩ. .
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Startup Regulator
V_CC Reg V_CC Regulator Output
V_CC Current Limit
V_CC Supply
V_CC undervoltage Lockout Voltage
(V_CC increasing)
V_CC Undervoltage Hysteresis
V_CC UVLO Delay (filter)
Operating Current (I_CC)
Shutdown/Standby Current
(2)
Non-Switching, FB = 3V
RON/SD = 0V
6.6
7
7.4
V
11
mA
6.3
V
206
mV
3
µs
500
675
µA
70
150
µA
Switch Characteristics
Buck Switch Rds(on)
I_TEST = 200mA,
VBST −VSW = 6.3V⁽³⁾
0.74
1.34
Ω
Gate Drive UVLO (VBST – VSW) Rising
3.4
4.5
5.5
V
Gate Drive UVLO Hysteresis
400
mV
Current Limit
Current Limit Threshold
535
725
900
mA
Current Limit Response Time
I_switch Overdrive = 0.1A Time to
Switch Off
225
ns
OFF time generator (test 1)
FB=0V, RCL = 100K
17
µs
OFF time generator (test 2)
FB=2.3V, RCL = 100K
2.65
µs
On Time Generator
TON -1
Vin = 10V
Ron = 200K
2.15
2.77
3.5
µs
TON -2
Vin = 40V
Ron = 200K
450
615
810
ns
Remote Shutdown Threshold
Rising
0.45
0.7
1.1
V
Remote Shutdown Hysteresis
40
mV
Minimum Off Time
Minimum Off Timer
FB = 0V
300
ns
Regulation and OV Comparators
FB Reference Threshold
Internal reference
Trip point for switch ON
2.445
2.5
2.550
V
FB Over-Voltage Threshold
Trip point for switch OFF
2.875
V
FB Bias Current
100
nA
Thermal Shutdown
Tsd
Thermal Shutdown Temp.
165
°C
Thermal Shutdown Hysteresis
25
°C
Thermal Resistance
θ_JA
Junction to Ambient
DGK Package
NGT Package
200
°C/W
40
°C/W
(1) All limits are guaranteed. All electrical characteristics having room temperature limits are tested during production with T_A = T_J = 25°C.
All hot and cold limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying
statistical process control.
(2) The V_CC output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external
loading.
(3) For devices procured in the WSON-8 package the Rds(on) limits are guaranteed by design characterization data only.
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