Datasheet

LM2524D, LM3524D
www.ti.com SNVS766E –JUNE 2009–REVISED MAY 2013
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1)(2)
Supply Voltage 40V
Collector Supply Voltage LM2524D 55V
LM3524D 40V
Output Current DC (each) 200 mA
Oscillator Charging Current (Pin 7) 5 mA
Internal Power Dissipation 1W
Operating Junction Temperature Range
(3)
LM2524D −40°C to +125°C
LM3524D 0°C to +125°C
Maximum Junction Temperature 150°
Storage Temperature Range −65°C to +150°C
Lead Temperature (Soldering 4 sec.) NFG, D Pkg. 260°C
(1) Absolute maximum ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its rated operating conditions.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) For operation at elevated temperatures, devices in the NFG package must be derated based on a thermal resistance of 86°C/W,
junction to ambient. Devices in the D package must be derated at 125°C/W, junction to ambient.
Electrical Characteristics
(1)
Symbol Parameter Conditions LM2524D LM3524D
Units
Typ Tested Design Typ Tested Design
Limit
(2)
Limit
(3)
Limit
(2)
Limit
(3)
REFERENCE SECTION
V
REF
Output Voltage 5 4.85 4.80 5 4.75 V
Min
5.15 5.20 5.25 V
Max
V
RLine
Line Regulation V
IN
= 8V to 40V 10 15 30 10 25 50 mV
Max
V
RLoad
Load Regulation I
L
= 0 mA to 20 mA 10 15 25 10 25 50 mV
Max
ΔV
IN
/ΔV
REF
Ripple Rejection f = 120 Hz 66 66 dB
I
OS
Short Circuit Current V
REF
= 0 25 25 mA Min
50 50
180 200 mA Max
N
O
Output Noise 10 Hz ≤ f ≤ 10 kHz 40 100 40 100 μV
rms
Max
Long Term Stability T
A
= 125°C 20 20 mV/kHr
OSCILLATOR SECTION
f
OSC
Max. Freq. R
T
= 1k, C
T
= 0.001 μF
(4)
550 500 350 kHz
Min
f
OSC
Initial Accuracy R
T
= 5.6k, C
T
= 0.01 μF
(4)
17.5 17.5 kHz
Min
20 20
22.5 22.5 kHz
Max
R
T
= 2.7k, C
T
= 0.01 μF
(4)
34 30 kHz
Min
38 38
42 46 kHz
Max
(1) Unless otherwise stated, these specifications apply for T
A
= T
J
= 25°C. Boldface numbers apply over the rated temperature range:
LM2524D is −40° to 85°C and LM3524D is 0°C to 70°C. V
IN
= 20V and f
OSC
= 20 kHz.
(2) Tested limits are ensured and 100% tested in production.
(3) Design limits are ensured (but not 100% production tested) over the indicated temperature and supply voltage range. These limits are
not used to calculate outgoing quality level.
(4) The value of a C
t
capacitor can vary with frequency. Careful selection of this capacitor must be made for high frequency operation.
Polystyrene was used in this test. NPO ceramic or polypropylene can also be used.
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