LM2825N-12 National Semiconductor, LM2825N-12 Datasheet - Page 4

• Manufacturer Part Number: LM2825N-12
• Description: SWITCHING REG 1A 12V, 2825, DIP24
• Manufacturer: National Semiconductor

Specifications of LM2825N-12

• Primary Input Voltage: 24V
• No. Of Outputs: 1
• Output Voltage: 12V
• Output Current: 1A
• Voltage Regulator Case Style: DIP
• No. Of Pins: 24
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

www.national.com
I
I
I
I
f
SHUTDOWN/SOFT-START CONTROL Test Circuit Figure 2
V
V
I
I
Symbol
CL
Q
STBY
ADJ
O
SD
SS
Specifications with standard type face are for T
less otherwise specified, V
JA
SD
SS
All Output Voltage Versions Electrical Characteristics
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Voltage internally clamped. If clamp voltage is exceeded, limit current to a maximum of 5 mA.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.
Note 4: When the LM2825 is used as shown in Figure 2 test circuit, system performance will be as shown in Electrical Characteristics.
Note 5: When the LM2825 is used as shown in Figure 3 test circuit, system performance will be as shown in Electrical Characteristics.
Note 6: Typical numbers are at 25˚C and represent the most likely norm.
Note 7: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face) when output current is limited to the value given
in the temperature derating curves. See the application section for curves. All limits at temperature extremes are guaranteed using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 8: I
Note 9: The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current over-
load.
Note 10: Junction to ambient thermal resistance (no external heat sink) for the DIP-24 package with the leads soldered to a printed circuit board with (1 oz.) copper
area of approximately 2 in
LOAD
DC Output Current
Limit
Operating Quiescent
Current
Standby Quiescent
Current
Adjust Pin Bias Current
Oscillator Frequency
Thermal Resistance
Shutdown Threshold
Voltage
Soft-start Voltage
Shutdown Current
Soft-start Current
= 0A.
Parameter
2
.
IN
= 12V for 3.3V, 5.0V and ADJ versions, V
R
SD/SS Pin = 3.1V
(Note 8)
SD/SS Pin = 0V
(Note 8)
Adjustable Versions Only, V
(Note 9)
Junction to Ambient (Note 10)
Low (Shutdown Mode)
High (Soft-start Mode)
V
V
V
(Note 8)
V
(Note 8)
L
OUT
OUT
SHUTDOWN
SOFT-START
= 0
= 20% of Nominal Output Voltage
= 100% of Nominal Output Voltage
A
= 25˚C, and those with boldface type apply over full Operating Range. Un-
= 0.5V
= 2.5V
Conditions
4
FB
= 1.3V
IN
= 24V for 12V and H-ADJ versions, I
(Note 6)
Typical
150
1.4
1.3
1.6
65
30
5
6
2
3
5
LM2825-XX
(Note 7)
50/100
Limit
200
1.2
2.4
0.6
2.0
10
10
5
LOAD
= 100 mA.
mA(max)
µA(max)
nA(max)
µA(max)
µA(max)
(Limits)
A(max)
V(max)
A(min)
V(min)
Units
˚C/W
kHz
mA
µA
nA
µA
µA
A
V
V