NSC LM2592HV3.3MDC, LM2592HVSX-3.3, LM2592HVS-ADJ, LM2592HVS-3.3, LM2592HVADJMWC Datasheet
...
August 2001
LM2592HV
SIMPLE SWITCHER® Power Converter 150 kHz 2A
Step-Down Voltage Regulator
General Description
The LM2592HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 2A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, and an adjustable output version.
This series of switching regulators is similar to the LM2593HV, but without some of the supervisory and performance features of the latter.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation², improved line and load specifications and a fixed-frequency oscillator.
The LM2592HV operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 Surface mount package.
Other features include a guaranteed ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 90 µA standby current. Self protection features include a two stage
current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.
Features
n3.3V, 5V, and adjustable output versions
nAdjustable version output voltage range, 1.2V to 57V
±4% max over line and load conditions
nGuaranteed 2A output load current
nAvailable in 5-pin TO-220 and TO-263 (surface mount) Package
nInput voltage range up to 60V
n150 kHz fixed frequency internal oscillator
nOn/Off control
nLow power standby mode, IQ typically 90 µA
nHigh Efficiency
nThermal shutdown and current limit protection
Applications
nSimple high-efficiency step-down (buck) regulator
nEfficient pre-regulator for linear regulators
nOn-card switching regulators
nPositive to Negative converter
Note: ² Patent Number 5,382,918.
Typical Application (Fixed Output Voltage Versions)
10129401
SIMPLE SWITCHER® and Switchers Made Simple® are registered trademarks of National Semiconductor Corporation.
Regulator Voltage Down-Step 2A kHz 150 Converter Power SWITCHER SIMPLE LM2592HV
© 2001 National Semiconductor Corporation |
DS101294 |
www.national.com |
LM2592HV
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 (VIN) |
63V |
|
|
|
−0.3 ≤ V ≤ +25V |
ON/OFF Pin Voltage |
||
Feedback Pin Voltage |
−0.3 ≤ V ≤ +25V |
|
Output Voltage to Ground |
|
|
(Steady State) |
−1V |
|
Power Dissipation |
Internally limited |
|
Storage Temperature Range |
−65ÊC to +150ÊC |
|
ESD Susceptibility |
|
|
Human Body Model (Note 2) |
2 kV |
Lead Temperature |
|
S Package |
|
Vapor Phase (60 sec.) |
+215ÊC |
Infrared (10 sec.) |
+245ÊC |
T Package (Soldering, 10 sec.) |
+260ÊC |
Maximum Junction Temperature |
+150ÊC |
Operating Conditions
Temperature Range |
−40ÊC ≤ TJ ≤ +125ÊC |
Supply Voltage |
4.5V to 60V |
LM2592HV-3.3
Electrical Characteristics
Specifications with standard type face are for TJ = 25ÊC, and those with boldface type apply over full Operating Temperature Range.
Symbol |
Parameter |
Conditions |
LM2592HV-3.3 |
Units |
|
|
|
|
|
|
(Limits) |
|
|
|
Typ |
Limit |
|
|
|
|
(Note 3) |
(Note 4) |
|
|
|
|
|
|
|
SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1 |
|
|
|
||
|
|
|
|
|
|
VOUT |
Output Voltage |
4.75V ≤ VIN ≤ 60V, 0.2A ≤ ILOAD ≤ 2A |
3.3 |
|
V |
|
|
|
|
3.168/3.135 |
V(min) |
|
|
|
|
3.432/3.465 |
V(max) |
|
|
|
|
|
|
η |
Efficiency |
VIN = 12V, ILOAD = 2A |
76 |
|
|
LM2592HV-5.0
Electrical Characteristics
Specifications with standard type face are for TJ = 25ÊC, and those with boldface type apply over full Operating Temperature Range.
Symbol |
Parameter |
Conditions |
LM2592HV-5.0 |
Units |
|
|
|
|
|
|
(Limits) |
|
|
|
Typ |
Limit |
|
|
|
|
(Note 3) |
(Note 4) |
|
|
|
|
|
|
|
SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1 |
|
|
|
||
|
|
|
|
|
|
VOUT |
Output Voltage |
7V ≤ VIN ≤ 60V, 0.2A ≤ ILOAD ≤ 2A |
5 |
|
V |
|
|
|
|
4.800/4.750 |
V(min) |
|
|
|
|
5.200/5.250 |
V(max) |
|
|
|
|
|
|
η |
Efficiency |
VIN = 12V, ILOAD = 2A |
81 |
|
% |
LM2592HV-ADJ
Electrical Characteristics
Specifications with standard type face are for TJ = 25ÊC, and those with boldface type apply over full Operating Temperature Range.
Symbol |
Parameter |
Conditions |
LM2592HV-ADJ |
Units |
|
|
|
|
|
|
(Limits) |
|
|
|
Typ |
Limit |
|
|
|
|
(Note 3) |
(Note 4) |
|
|
|
|
|
|
|
SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1 |
|
|
|
||
|
|
|
|
|
|
VFB |
Feedback Voltage |
4.5V ≤ VIN ≤ 60V, 0.2A ≤ ILOAD ≤ 2A |
1.230 |
|
V |
|
|
VOUT programmed for 3V. Circuit of Figure 1. |
|
1.193/1.180 |
V(min) |
|
|
|
|
1.267/1.280 |
V(max) |
|
|
|
|
|
|
η |
Efficiency |
VIN = 12V, VOUT = 3V, ILOAD = 2A |
75 |
|
% |
www.national.com |
2 |
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for TJ = 25ÊC, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version. ILOAD = 500 mA
Symbol |
|
|
Parameter |
|
|
Conditions |
|
LM2592HV-XX |
Units |
||
|
|
|
|
|
|
|
|
|
|
|
(Limits) |
|
|
|
|
|
|
|
|
|
Typ |
Limit |
|
|
|
|
|
|
|
|
|
|
(Note 3) |
(Note 4) |
|
|
|
|
|
|
|
|
|
|
|
|
|
DEVICE PARAMETERS |
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
||
Ib |
Feedback Bias Current |
|
Adjustable Version Only, VFB = 1.3V |
10 |
|
nA |
|||||
|
|
|
|
|
|
|
|
|
|
50/100 |
nA (max) |
|
|
|
|
|
|
|
|
|
|
|
|
fO |
Oscillator Frequency |
|
(Note 6) |
|
|
150 |
|
kHz |
|||
|
|
|
|
|
|
|
|
|
|
127/110 |
kHz(min) |
|
|
|
|
|
|
|
|
|
|
173/173 |
kHz(max) |
|
|
|
|
|
|
|
|
|
|
|
|
VSAT |
Saturation Voltage |
IOUT = 2A (Note 7) (Note 8) |
|
1.10 |
|
V |
|||||
|
|
|
|
|
|
|
|
|
|
1.3/1.4 |
V(max) |
|
|
|
|
|
|
|
|
|
|
|
|
DC |
|
Max Duty Cycle (ON) |
|
(Note 8) |
|
|
100 |
|
% |
||
|
|
Min Duty Cycle (OFF) |
|
(Note 9) |
|
|
0 |
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
ICLIM |
Switch current Limit |
|
Peak Current, (Note 7) (Note 8) |
|
3.0 |
|
A |
||||
|
|
|
|
|
|
|
|
|
|
2.4/2.3 |
A(min) |
|
|
|
|
|
|
|
|
|
|
3.7/4.0 |
A(max) |
|
|
|
|
|
|
|
|
|
|
|
|
IL |
Output Leakage Current |
|
(Note 7) (Note 9) (Note 10) |
Output = 0V |
|
50 |
µA(max) |
||||
|
|
|
|
|
|
|
|
Output = −1V |
5 |
|
mA |
|
|
|
|
|
|
|
|
|
|
30 |
mA(max) |
|
|
|
|
|
|
|
|
|
|
|
|
IQ |
Operating Quiescent |
|
|
|
5 |
|
mA |
||||
|
SD |
/SS Pin Open (Note 9) |
|
|
|||||||
|
|
Current |
|
|
|
|
|
|
10 |
mA(max) |
|
|
|
|
|
|
|
|
|
|
|
|
|
ISTBY |
Standby Quiescent |
|
|
(Note 10) |
90 |
|
µA |
||||
|
SD |
/SS pin = 0V |
|
||||||||
|
|
Current |
|
|
|
|
|
|
200/250 |
µA(max) |
|
|
|
|
|
|
|
|
|
|
|
||
θJC |
Thermal Resistance |
|
TO220 or TO263 Package, Junction to Case |
2 |
|
ÊC/W |
|||||
θJA |
|
|
|
TO220 Package, Juncton to Ambient (Note 11) |
50 |
|
ÊC/W |
||||
θJA |
|
|
|
TO263 Package, Juncton to Ambient (Note 12) |
50 |
|
ÊC/W |
||||
θJA |
|
|
|
TO263 Package, Juncton to Ambient (Note 13) |
30 |
|
ÊC/W |
||||
θJA |
|
|
|
TO263 Package, Juncton to Ambient (Note 14) |
20 |
|
ÊC/W |
||||
ON/OFF CONTROL Test Circuit Figure 1 |
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ON |
/OFF Pin Logic Input |
|
|
|
|
|
1.3 |
|
V |
VIH |
Threshold Voltage |
Low (Regulator ON) |
|
|
|
0.6 |
V(max) |
||||
VIL |
|
|
|
High (Regulator OFF) |
|
|
|
2.0 |
V(min) |
||
IH |
|
VLOGIC = 2.5V (Regulator OFF) |
|
5 |
|
µA |
|||||
|
ON |
/OFF Pin Input Current |
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
15 |
µA(max) |
|
|
|
|
|
|
|
|
|
|
|
|
IL |
|
|
|
VLOGIC = 0.5V (Regulator ON) |
|
0.02 |
|
µA |
|||
|
|
|
|
|
|
|
|
|
|
5 |
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: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.
Note 3: Typical numbers are at 25ÊC and represent the most likely norm.
Note 4: 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. All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 5: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2592HV is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.
Note 6: The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current overload.
Note 7: No diode, inductor or capacitor connected to output pin.
Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 9: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version to force the output transistor switch OFF.
Note 10: VIN = 60V.
LM2592HV
3 |
www.national.com |
LM2592HV
All Output Voltage Versions
Electrical Characteristics (Continued)
Note 11: Junction to ambient thermal resistance (no external heat sink) for the package mounted TO-220 package mounted vertically, with the leads soldered to a printed circuit board with (1 oz.) copper area of approximately 1 in2.
Note 12: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 0.5 in2 of (1 oz.) copper area.
Note 13: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in2 of (1 oz.) copper area.
Note 14: Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in2 of (1 oz.) copper area on the LM2592HVS side of the board, and approximately 16 in2 of copper on the other side of the p-c board. See application hints in this data sheet and the thermal model in Switchers Made Simple available at http://power.national.com.
www.national.com |
4 |
Typical Performance Characteristics (Circuit of Figure 1)
Normalized |
|
|
Output Voltage |
Line Regulation |
Efficiency |
10129402 |
10129403 |
10129404 |
Switch Saturation |
|
|
Voltage |
Switch Current Limit |
Dropout Voltage |
10129405 |
|
10129406 |
10129407 |
|
|
||
Operating |
Shutdown |
|
Minimum Operating |
Quiescent Current |
Quiescent Current |
|
Supply Voltage |
10129408 |
10129409 |
10129410 |
LM2592HV
5 |
www.national.com |
LM2592HV
Typical Performance Characteristics (Circuit of Figure 1) (Continued)
Feedback Pin |
|
|
Bias Current |
Switching Frequency |
ON/OFF Threshold Voltage |
10129411 |
10129413 |
10129479 |
|
|
|
Internal Gain-Phase Characteristics |
|
ON/OFF Pin Current (Sinking) |
|
||
10129480
10129478
www.national.com |
6 |
Loading...