April 2007
LM1575/LM2575/LM2575HV
SIMPLE SWITCHER® 1A Step-Down Voltage Regulator
General Description
The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.
The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.
A standard series of inductors optimized for use with the LM2575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
Features
■3.3V, 5V, 12V, 15V, and adjustable output versions
■Adjustable version output voltage range,
1.23V to 37V (57V for HV version) ±4% max over line and load conditions
■Guaranteed 1A output current
■Wide input voltage range, 40V up to 60V for HV version
■Requires only 4 external components
■52 kHz fixed frequency internal oscillator
■TTL shutdown capability, low power standby mode
■High efficiency
■Uses readily available standard inductors
■Thermal shutdown and current limit protection
■P+ Product Enhancement tested
Applications
■Simple high-efficiency step-down (buck) regulator
■Efficient pre-regulator for linear regulators
■On-card switching regulators
■Positive to negative converter (Buck-Boost)
Typical Application
(Fixed Output Voltage Versions)
1147501
Note: Pin numbers are for the TO-220 package.
SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation
Regulator Voltage Down-Step 1A SWITCHER SIMPLE Series LM1575/LM2575/LM2575HV
© 2007 National Semiconductor Corporation |
11475 |
www.national.com |
LM1575/LM2575/LM2575HV
Block Diagram and Typical Application
1147502
3.3V, R2 = 1.7k 5V, R2 = 3.1k 12V, R2 = 8.84k 15V, R2 = 11.3k For ADJ. Version
R1 = Open, R2 = 0Ω
Note: Pin numbers are for the TO-220 package.
FIGURE 1.
www.national.com |
2 |
Connection Diagrams
(XX indicates output voltage option. See Ordering Information table for complete part number.)
Straight Leads |
Bent, Staggered Leads |
5–Lead TO-220 (T) |
5-Lead TO-220 (T) |
1147522
Top View LM2575T-XX or LM2575HVT-XX See NS Package Number T05A
16–Lead DIP (N or J)
1147525
*No Internal Connection
Top View LM2575N-XX or LM2575HVN-XX See NS Package Number N16A
LM1575J-XX-QML
See NS Package Number J16A
1147524
Side View
LM2575T-XX Flow LB03 or
Top View 1147523 LM2575HVT-XX Flow LB03
See NS Package Number T05D
24-Lead Surface Mount (M)
1147526
*No Internal Connection
Top View LM2575M-XX or LM2575HVM-XX
See NS Package Number M24B
TO-263(S)
5-Lead Surface-Mount Package
1147529
Top View
1147530
Side View LM2575S-XX or LM2575HVS-XX See NS Package Number TS5B
LM1575/LM2575/LM2575HV
3 |
www.national.com |
LM1575/LM2575/LM2575HV
Ordering Information
Package |
NSC |
Standard |
High |
Temperature |
Type |
Package |
Voltage Rating |
Voltage Rating |
Range |
|
Number |
(40V) |
(60V) |
|
5-Lead TO-220 |
T05A |
LM2575T-3.3 |
LM2575HVT-3.3 |
|
Straight Leads |
|
LM2575T-5.0 |
LM2575HVT-5.0 |
|
|
|
LM2575T-12 |
LM2575HVT-12 |
|
|
|
LM2575T-15 |
LM2575HVT-15 |
|
|
|
LM2575T-ADJ |
LM2575HVT-ADJ |
|
5-Lead TO-220 |
T05D |
LM2575T-3.3 Flow LB03 |
LM2575HVT-3.3 Flow LB03 |
|
Bent and |
|
LM2575T-5.0 Flow LB03 |
LM2575HVT-5.0 Flow LB03 |
|
Staggered Leads |
|
LM2575T-12 Flow LB03 |
LM2575HVT-12 Flow LB03 |
|
|
|
LM2575T-15 Flow LB03 |
LM2575HVT-15 Flow LB03 |
|
|
|
LM2575T-ADJ Flow LB03 |
LM2575HVT-ADJ Flow LB03 |
|
|
|
|
|
−40°C ≤ TJ ≤ +125°C |
16-Pin Molded |
N16A |
LM2575N-5.0 |
LM2575HVN-5.0 |
|
DIP |
|
LM2575N-12 |
LM2575HVN-12 |
|
|
|
LM2575N-15 |
LM2575HVN-15 |
|
|
|
LM2575N-ADJ |
LM2575HVN-ADJ |
|
24-Pin |
M24B |
LM2575M-5.0 |
LM2575HVM-5.0 |
|
Surface Mount |
|
LM2575M-12 |
LM2575HVM-12 |
|
|
|
LM2575M-15 |
LM2575HVM-15 |
|
|
|
LM2575M-ADJ |
LM2575HVM-ADJ |
|
|
|
|
|
|
5-Lead TO-263 |
TS5B |
LM2575S-3.3 |
LM2575HVS-3.3 |
|
Surface Mount |
|
LM2575S-5.0 |
LM2575HVS-5.0 |
|
|
|
LM2575S-12 |
LM2575HVS-12 |
|
|
|
LM2575S-15 |
LM2575HVS-15 |
|
|
|
LM2575S-ADJ |
LM2575HVS-ADJ |
|
|
|
|
|
|
16-Pin Ceramic |
J16A |
LM1575J-3.3-QML |
|
|
DIP |
|
LM1575J-5.0-QML |
|
|
|
|
LM1575J-12-QML |
|
−55°C ≤ TJ ≤ +150°C |
|
|
LM1575J-15-QML |
|
|
|
|
LM1575J-ADJ-QML |
|
|
www.national.com |
4 |
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Maximum Supply Voltage |
|
|
LM1575/LM2575 |
45V |
|
LM2575HV |
63V |
|
|
|
−0.3V ≤ V ≤ +VIN |
ON /OFF Pin Input Voltage |
||
Output Voltage to Ground |
|
|
(Steady State) |
−1V |
|
Power Dissipation |
Internally Limited |
|
Storage Temperature Range |
−65°C to +150°C |
|
Maximum Junction Temperature |
150°C |
|
Minimum ESD Rating |
|
(C = 100 pF, R = 1.5 kΩ) |
2 kV |
Lead Temperature |
|
(Soldering, 10 sec.) |
260°C |
Operating Ratings
Temperature Range |
|
LM1575 |
−55°C ≤ TJ ≤ +150°C |
LM2575/LM2575HV |
−40°C ≤ TJ ≤ +125°C |
Supply Voltage |
|
LM1575/LM2575 |
40V |
LM2575HV |
60V |
LM1575-3.3, LM2575-3.3, LM2575HV-3.3 Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range .
Symbol |
Parameter |
Conditions |
Typ |
LM1575-3.3 |
LM2575-3.3 |
Units |
|
|
|
|
|
LM2575HV-3.3 |
(Limits) |
|
|
|
|
Limit |
Limit |
|
|
|
|
|
(Note 2) |
(Note 3) |
|
|
|
|
|
|
|
|
SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 |
|
|
|
|
||
|
|
|
|
|
|
|
VOUT |
Output Voltage |
VIN = 12V, ILOAD = 0.2A |
3.3 |
|
|
V |
|
|
Circuit of Figure 2 |
|
3.267 |
3.234 |
V(Min) |
|
|
|
|
3.333 |
3.366 |
V(Max) |
VOUT |
Output Voltage |
4.75V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1A |
3.3 |
|
|
V |
|
LM1575/LM2575 |
Circuit of Figure 2 |
|
3.200/3.168 |
3.168/3.135 |
V(Min) |
|
|
|
|
3.400/3.432 |
3.432/3.465 |
V(Max) |
|
|
|
|
|
|
|
VOUT |
Output Voltage |
4.75V ≤ VIN ≤ 60V, 0.2A ≤ ILOAD ≤ 1A |
3.3 |
|
|
V |
|
LM2575HV |
Circuit of Figure 2 |
|
3.200/3.168 |
3.168/3.135 |
V(Min) |
|
|
|
|
3.416/3.450 |
3.450/3.482 |
V(Max) |
|
|
|
|
|
|
|
η |
Efficiency |
VIN = 12V, ILOAD = 1A |
75 |
|
|
% |
LM1575-5.0, LM2575-5.0, LM2575HV-5.0 Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range.
Symbol |
Parameter |
Conditions |
Typ |
LM1575-5.0 |
LM2575-5.0 |
Units |
|
|
|
|
|
LM2575HV-5.0 |
(Limits) |
|
|
|
|
Limit |
Limit |
|
|
|
|
|
(Note 2) |
(Note 3) |
|
|
|
|
|
|
|
|
SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 |
|
|
|
|
||
VOUT |
Output Voltage |
VIN = 12V, ILOAD = 0.2A |
5.0 |
|
|
V |
|
|
Circuit of Figure 2 |
|
4.950 |
4.900 |
V(Min) |
|
|
|
|
5.050 |
5.100 |
V(Max) |
|
|
|
|
|
|
|
VOUT |
Output Voltage |
0.2A ≤ ILOAD ≤ 1A, |
5.0 |
|
|
V |
|
LM1575/LM2575 |
8V ≤ VIN ≤ 40V |
|
4.850/4.800 |
4.800/4.750 |
V(Min) |
|
|
Circuit of Figure 2 |
|
5.150/5.200 |
5.200/5.250 |
V(Max) |
LM1575/LM2575/LM2575HV
5 |
www.national.com |
LM1575/LM2575/LM2575HV
Symbol |
Parameter |
Conditions |
Typ |
LM1575-5.0 |
LM2575-5.0 |
Units |
|
|
|
|
|
LM2575HV-5.0 |
(Limits) |
|
|
|
|
Limit |
Limit |
|
|
|
|
|
(Note 2) |
(Note 3) |
|
VOUT |
Output Voltage |
0.2A ≤ ILOAD ≤ 1A, |
5.0 |
|
|
V |
|
LM2575HV |
8V ≤ VIN ≤ 60V |
|
4.850/4.800 |
4.800/4.750 |
V(Min) |
|
|
Circuit of Figure 2 |
|
5.175/5.225 |
5.225/5.275 |
V(Max) |
|
|
|
|
|
|
|
η |
Efficiency |
VIN = 12V, ILOAD = 1A |
77 |
|
|
% |
LM1575-12, LM2575-12, LM2575HV-12 Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range .
Symbol |
Parameter |
Conditions |
Typ |
LM1575-12 |
LM2575-12 |
Units |
|
|
|
|
|
LM2575HV-12 |
(Limits) |
|
|
|
|
Limit |
Limit |
|
|
|
|
|
(Note 2) |
(Note 3) |
|
|
|
|
|
|
|
|
SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 |
|
|
|
|
||
VOUT |
Output Voltage |
VIN = 25V, ILOAD = 0.2A |
12 |
|
|
V |
|
|
Circuit of Figure 2 |
|
11.88 |
11.76 |
V(Min) |
|
|
|
|
12.12 |
12.24 |
V(Max) |
|
|
|
|
|
|
|
VOUT |
Output Voltage |
0.2A ≤ ILOAD ≤ 1A, |
12 |
|
|
V |
|
LM1575/LM2575 |
15V ≤ VIN ≤ 40V |
|
11.64/11.52 |
11.52/11.40 |
V(Min) |
|
|
Circuit of Figure 2 |
|
12.36/12.48 |
12.48/12.60 |
V(Max) |
VOUT |
Output Voltage |
0.2A ≤ ILOAD ≤ 1A, |
12 |
|
|
V |
|
LM2575HV |
15V ≤ VIN ≤ 60V |
|
11.64/11.52 |
11.52/11.40 |
V(Min) |
|
|
Circuit of Figure 2 |
|
12.42/12.54 |
12.54/12.66 |
V(Max) |
η |
Efficiency |
VIN = 15V, ILOAD = 1A |
88 |
|
|
% |
LM1575-15, LM2575-15, LM2575HV-15 Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range .
Symbol |
Parameter |
Conditions |
Typ |
LM1575-15 |
LM2575-15 |
Units |
|
|
|
|
|
LM2575HV-15 |
(Limits) |
|
|
|
|
Limit |
Limit |
|
|
|
|
|
(Note 2) |
(Note 3) |
|
SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 |
|
|
|
|
||
VOUT |
Output Voltage |
VIN = 30V, ILOAD = 0.2A |
15 |
|
|
V |
|
|
Circuit of Figure 2 |
|
14.85 |
14.70 |
V(Min) |
|
|
|
|
15.15 |
15.30 |
V(Max) |
|
|
|
|
|
|
|
VOUT |
Output Voltage |
0.2A ≤ ILOAD ≤ 1A, |
15 |
|
|
V |
|
LM1575/LM2575 |
18V ≤ VIN ≤ 40V |
|
14.55/14.40 |
14.40/14.25 |
V(Min) |
|
|
Circuit of Figure 2 |
|
15.45/15.60 |
15.60/15.75 |
V(Max) |
VOUT |
Output Voltage |
0.2A ≤ ILOAD ≤ 1A, |
15 |
|
|
V |
|
LM2575HV |
18V ≤ VIN ≤ 60V |
|
14.55/14.40 |
14.40/14.25 |
V(Min) |
|
|
Circuit of Figure 2 |
|
15.525/15.675 |
15.68/15.83 |
V(Max) |
η |
Efficiency |
VIN = 18V, ILOAD = 1A |
88 |
|
|
% |
www.national.com |
6 |
LM1575-ADJ, LM2575-ADJ, LM2575HV-ADJ Electrical Characteristics
Specifications with standard type face are for TJ= 25°C, and those with boldface type apply over full Operating Temperature Range.
Symbol |
Parameter |
Conditions |
Typ |
LM1575-ADJ |
LM2575-ADJ |
Units |
|
|
|
|
|
LM2575HV-ADJ |
(Limits) |
|
|
|
|
Limit |
Limit |
|
|
|
|
|
(Note 2) |
(Note 3) |
|
|
|
|
|
|
|
|
SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 |
|
|
|
|
||
|
|
|
|
|
|
|
VOUT |
Feedback Voltage |
VIN = 12V, ILOAD = 0.2A |
1.230 |
|
|
V |
|
|
VOUT = 5V |
|
1.217 |
1.217 |
V(Min) |
|
|
Circuit of Figure 2 |
|
1.243 |
1.243 |
V(Max) |
|
|
|
|
|
|
|
VOUT |
Feedback Voltage |
0.2A ≤ ILOAD ≤ 1A, |
1.230 |
|
|
V |
|
LM1575/LM2575 |
8V ≤ VIN ≤ 40V |
|
1.205/1.193 |
1.193/1.180 |
V(Min) |
|
|
VOUT = 5V, Circuit of Figure 2 |
|
1.255/1.267 |
1.267/1.280 |
V(Max) |
VOUT |
Feedback Voltage |
0.2A ≤ ILOAD ≤ 1A, |
1.230 |
|
|
V |
|
LM2575HV |
8V ≤ VIN ≤ 60V |
|
1.205/1.193 |
1.193/1.180 |
V(Min) |
|
|
VOUT = 5V, Circuit of Figure 2 |
|
1.261/1.273 |
1.273/1.286 |
V(Max) |
η |
Efficiency |
VIN = 12V, ILOAD = 1A, VOUT = 5V |
77 |
|
|
% |
All Output Voltage Versions Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version, VIN = 25V for the 12V version, and VIN = 30V for the 15V version. ILOAD = 200 mA.
Symbol |
Parameter |
|
|
|
Conditions |
Typ |
LM1575-XX |
LM2575-XX |
Units |
|
|
|
|
|
|
|
|
LM2575HV-XX |
(Limits) |
|
|
|
|
|
|
|
Limit |
Limit |
|
|
|
|
|
|
|
|
(Note 2) |
(Note 3) |
|
|
|
|
|
|
|
|
|
|
|
DEVICE PARAMETERS |
|
|
|
|
|
|
|
|
|
Ib |
Feedback Bias Current |
|
VOUT = 5V (Adjustable Version Only) |
50 |
100/500 |
100/500 |
nA |
||
fO |
Oscillator Frequency |
|
(Note 13) |
|
52 |
|
|
kHz |
|
|
|
|
|
|
|
|
47/43 |
47/42 |
kHz(Min) |
|
|
|
|
|
|
|
58/62 |
58/63 |
kHz(Max) |
|
|
|
|
|
|
|
|
|
|
VSAT |
Saturation Voltage |
|
IOUT = 1A (Note 5) |
0.9 |
|
|
V |
||
|
|
|
|
|
|
|
1.2/1.4 |
1.2/1.4 |
V(Max) |
DC |
Max Duty Cycle (ON) |
|
(Note 6) |
|
98 |
|
|
% |
|
|
|
|
|
|
|
|
93 |
93 |
%(Min) |
ICL |
Current Limit |
|
Peak Current (Notes 5, 13) |
2.2 |
|
|
A |
||
|
|
|
|
|
|
|
1.7/1.3 |
1.7/1.3 |
A(Min) |
|
|
|
|
|
|
|
3.0/3.2 |
3.0/3.2 |
A(Max) |
IL |
Output Leakage |
|
(Notes 7, 8) |
Output = 0V |
|
2 |
2 |
mA(Max) |
|
|
Current |
|
Output = −1V |
7.5 |
|
|
mA |
||
|
|
|
Output = −1V |
|
30 |
30 |
mA(Max) |
||
IQ |
Quiescent Current |
|
(Note 7) |
|
5 |
|
|
mA |
|
|
|
|
|
|
|
|
10/12 |
10 |
mA(Max) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
μA |
|
ISTBY |
Standby Quiescent |
|
ON /OFF Pin = 5V (OFF) |
50 |
|
|
|||
|
Current |
|
|
|
|
|
200/500 |
200 |
μA(Max) |
LM1575/LM2575/LM2575HV
7 |
www.national.com |
LM1575/LM2575/LM2575HV
|
Symbol |
|
|
Parameter |
|
|
Conditions |
Typ |
LM1575-XX |
LM2575-XX |
Units |
|
|
|
|
|
|
|
|
|
|
|
|
LM2575HV-XX |
(Limits) |
|
|
|
|
|
|
|
|
|
|
Limit |
Limit |
|
|
|
|
|
|
|
|
|
|
|
(Note 2) |
(Note 3) |
|
|
θJA |
Thermal Resistance |
|
T Package, Junction to Ambient (Note 9) |
65 |
|
|
|
||||
|
θJA |
|
|
|
|
T Package, Junction to Ambient (Note 10) |
45 |
|
|
°C/W |
||
|
θJC |
|
|
|
|
T Package, Junction to Case |
2 |
|
|
|
||
|
θJA |
|
|
|
|
N Package, Junction to Ambient (Note 11) |
85 |
|
|
|
||
|
θJA |
|
|
|
|
M Package, Junction to Ambient (Note 11) |
100 |
|
|
|
||
|
θJA |
|
|
|
|
S Package, Junction to Ambient (Note 12) |
37 |
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
||
|
ON /OFF CONTROL Test Circuit Figure 2 |
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VIH |
ON /OFF Pin Logic |
|
VOUT = 0V |
1.4 |
2.2/2.4 |
2.2/2.4 |
V(Min) |
||||
|
VIL |
Input Level |
|
VOUT = Nominal Output Voltage |
1.2 |
1.0/0.8 |
1.0/0.8 |
V(Max) |
||||
|
|
|
|
|
|
|
|
|
|
|
μA |
|
|
IIH |
ON /OFF Pin Input |
|
ON /OFF Pin = 5V (OFF) |
12 |
|
|
|||||
|
|
|
Current |
|
|
|
|
30 |
30 |
μA(Max) |
||
|
|
|
|
|
|
|
|
|
|
|
μA |
|
|
IIL |
|
|
|
|
ON /OFF Pin = 0V (ON) |
0 |
|
|
|||
|
|
|
|
|
|
|
|
|
|
10 |
10 |
μA(Max) |
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All limits are used to calculate Average Outgoing Quality Level, and all are 100% production tested.
Note 3: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
Note 4: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM1575/ LM2575 is used as shown in the Figure 2 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.
Note 5: Output (pin 2) sourcing current. No diode, inductor or capacitor connected to output pin.
Note 6: Feedback (pin 4) removed from output and connected to 0V.
Note 7: Feedback (pin 4) removed from output and connected to +12V for the Adjustable, 3.3V, and 5V versions, and +25V for the 12V and 15V versions, to force the output transistor OFF.
Note 8: VIN = 40V (60V for the high voltage version).
Note 9: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads in a socket, or on a PC board with minimum copper area.
Note 10: Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads soldered to a PC board containing approximately 4 square inches of copper area surrounding the leads.
Note 11: Junction to ambient thermal resistance with approximately 1 square inch of pc board copper surrounding the leads. Additional copper area will lower thermal resistance further. See thermal model in Switchers made Simple software.
Note 12: If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package: Using 0.5 square inches of copper area, θJA is 50°C/W; with 1 square inch of copper area, θJA is 37°C/W; and with 1.6 or more square inches of copper area, θJA is 32°C/W.
Note 13: The oscillator frequency reduces to approximately 18 kHz in the event of an output short or an overload which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%.
Note 14: Refer to RETS LM1575J for current revision of military RETS/SMD.
www.national.com |
8 |
Typical Performance Characteristics |
(Circuit of Figure 2) |
Normalized Output Voltage |
Line Regulation |
1147533
|
1147532 |
Dropout Voltage |
Current Limit |
|
1147534 |
1147535 |
|
|
|
Quiescent Current |
|
Standby |
|
|
Quiescent Current |
1147536
1147537
LM1575/LM2575/LM2575HV
9 |
www.national.com |
Loading...