SC1566 Datasheet, PDF (3/9 Pages) Semtech Corporation – Very Low Dropout 3.0 Amp Regulator With Enable

SC1566
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: V_EN = V_IN. Adjustable Option (V_ADJ > V_TH(ADJ)): V_IN = 2.2V to 5.5V and I_O = 10µA to 3A.
Fixed Options (V_ADJ = GND): V_IN = (V_O + 0.7V) to 5.5V and I_O = 0A to 3A. Values in bold apply over the full operating temperature range.
Parameter
Symbol
Test Conditions
Min Typ Max
Units
VO (Cont.)
Dropout Voltage⁽¹⁾⁽²⁾
I_O = 1.5A
200 300 mV
400
I_O = 3A
350 450 mV
600
Minimum Load Current⁽³⁾
I_O
Current Limit
I_CL
ADJ
V_IN = V_O + 0.7V
1
10
µA
3.0
4.5
6.5
A
Reference Voltage⁽¹⁾
V_REF
V_IN = 2.2V, V_ADJ = V_OUT, I_O = 10mA
1.188 1.200 1.212 V
1.176
1.224
Adjust Pin Current⁽⁴⁾
Adjust Pin Threshold⁽⁵⁾
EN
I_ADJ
V_TH(ADJ)
V_ADJ = V_REF
10
50
nA
0.10 0.20 0.40 V
Enable Pin Current
I_EN
Enable Pin Threshold
V_IH
V_IL
Over Temperature Protection
V_EN = 0V, V_IN = 3.3V
V_IN = 3.3V
V_IN = 3.3V
1.5
10
µA
1.8
V
0.4
High Trip level
T_HI
175
°C
Hysteresis
T_HYST
10
°C
Notes:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) Defined as the input to output differential at which the output voltage drops to 1% below the value
measured at a differential of 0.7V.
(3) Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this
requirement. Adjustable versions only.
(4) Guaranteed by design.
(5) When V_ADJ exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from
the error amplifier and connects V_ADJ instead.
ã 2001 Semtech Corp.
3
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