LP2951-03YM Micrel Inc, LP2951-03YM Datasheet - Page 5

• Manufacturer Part Number: LP2951-03YM
• Description: IC REG LDO ADJ 100MA 8SOIC
• Manufacturer: Micrel Inc

Specifications of LP2951-03YM

• Regulator Topology: Positive Adjustable
• Voltage - Output: 1.24 ~ 29 V
• Voltage - Input: 2.3 ~ 30 V
• Voltage - Dropout (typical): 0.38V @ 100mA
• Number Of Regulators: 1
• Current - Output: 100mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Primary Input Voltage: 30V
• Output Voltage Fixed: 5V
• Dropout Voltage Vdo: 380mV
• No. Of Pins: 8
• Output Current: 100mA
• Operating Temperature Range: -40°C To +125°C
• Output Voltage: 5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 576-1052

Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-clamped
11. V
12. Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
13. Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line
14. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating
15. Line regulation for the LP2951 is tested at 150°C for I
Micrel, Inc.
Parameter
Input Logic Voltage
Shutdown Input Current
Regulator Output Current
in Shutdown
September 2008
Boldface limits apply at temperature extremes.
Unless otherwise specified all limits guaranteed for T
Feedback tied to 5V Tap and Output tied to Output Sense (V
Guaranteed and 100% production tested.
Guaranteed but not 100% production tested. These limits are not used to calculate outgoing AQL levels.
Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V
differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into
account.
Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage measured at
6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V
example, at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mV x 5V/1.235V = 384mV.
Thresholds remain constant as a percent of V
guaranteed.
V
The junction-to-ambient thermal resistance of the TO-92 package is 180°C/W with 0.4” leads and 160°C/W with 0.25” leads to a PC board. The
thermal resistance of the 8-pin DIP package is 105°C/W junction-to-ambient when soldered directly to a PC board. Junction-to-ambient thermal
resistance for the SOIC (M) package is 160°C/W.
May exceed input supply voltage.
to ground.
regulation effects. Specifications are for a 50mA load pulse at V
effects are covered in the specification for thermal regulation.
Typical Performance Characteristics for line regulation versus temperature and load current.
REF
SHUTDOWN
≤ V
OUT
≥ 2V, V
≤ (V
IN
IN
– 1 V), 2.3V ≤ V
≤ 30 V, V
OUT
= 0, with Feedback pin tied to 5V Tap.
IN
Condition
LP295x-02 (±0.5%)
Low
High
LP295x-03 (±1%)
Low
High
LP2951-4.8 (±1%)
Low
High
V
V
Note 11
≤ 30V, 100µA < I
SHUTDOWN
SHUTDOWN
OUT
= 2.4V
= 30V
as V
J
L
L
OUT
= 25°C, V
≤ 100mA, T
= 1mA. For I
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5%
OUT
IN
= 5V) and V
IN
= 6V, I
J
= 30V (1.25W pulse) for t = 10ms.
≤ T
L
= 100µA and T
JMAX
L
= 100µA and C
5
.
SHUTDOWN
J
≤ 0.8V.
= 125°C, line regulation is guaranteed by design to 0.2%. See
L
= 1µF. Additional conditions for the 8-pin versions are
Min
2.0
2.0
2.0
OUT
Typ
/V
450
1.3
1.3
1.3
30
3
REF
=(R1 + R2)/R2. For
Max
100
600
700
0.7
0.7
0.7
50
10
20
M9999-091208
LP2950/2951
Units
µA
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V