sc250wltrt Semtech Corporation, sc250wltrt Datasheet - Page 2

• Manufacturer Part Number: sc250wltrt
• Description: Sc250 Step-down Dc-dc Converter With Bias Ldo For Rf Power Amplifiers
• Manufacturer: Semtech Corporation

Exceeding the specifi cations below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specifi ed in the
Electrical Characteristics section is not recommended.
Unless otherwise noted: V
© 2006 Semtech Corp.
Note:
1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
2) Tested according to JEDEC standard JESD22-A114-B.
POWER MANAGEMENT
Electrical Characteristics
Absolute Maximum Ratings
Parameter
Input Voltage Range
V
V
V
V
V
V
V
Peak Inductor Current
Bypass FET Current Limit
Parameter
Input Supply Voltage
EN and VDAC Inputs
LX Pin Voltage (Power switch OFF)
VOUT Voltage
VOUT Short Circuit to GND duration
Thermal Impedance Junction to Ambient
Operating Ambient Temperature Range
Junction Temperature
Storage Temperature
Peak IR Refl ow Temperature
ESD Protection Level
OUT
OUT
OUT
REF
REF
REF
REF
Accuracy
Accuracy
Line Regulation
Load Regulation
Load Current
Line Regulation
Load Regulation
IN
= V
(2)
EN
=3.6V, T
A
= -40 to 85°C. Typical values are at T
Symbol
V
V
V
V
OUT LOAD
REF LOAD
OUT LINE
REF LINE
I
V
I
I
LX PK
V
PASS
REF
REF
V
IN
OUT
(1)
V
V
I
V
OUT
IN
IN
IN
= 4V, V
= 4V, V
= 0A to 600 mA, V
= 2.7V to 5.0V, V
I
REF
I
REF
V
Symbol
EN
= 1 mA, I
I
V
V
Conditions
REF
V
DAC
DAC
= 0.1 to 20 mA
V
T
θ
, V
t
T
T
T
OUT
SC
ESD
LX
JA
JC
IN
A
S
P
DAC
= 0.1V, I
= 1.1V, I
= 10 mA
2
A
= +25°C.
OUT
DAC
= 0A
OUT
OUT
DAC
= 0.7V
= 0.3A
= 0.3A
= 0.7V
-1 to V
Continuous
-60 to +160
Maximum
-40 to +85
Min
0.25
3.23
2.7
2.8
0.8
IN
-0.3 to 7
-0.3 to 7
-0.3 to 7
1
+150
+ 1, 7V MAX
260
110
2
2.85
Typ
-0.7
-0.5
0.3
3.3
PRELIMINARY
Max
0.35
3.37
5.0
0.4
2.9
0.3
1.5
2.5
20
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SC250
Units
°C/W
kV
Units
°C
°C
°C
°C
V
V
V
V
s
%/V
%/V
mA
%
%
V
V
V
V
A
A