LM3537_13 Datasheet, PDF (7/33 Pages) Texas Instruments – 8-Channel WLED Driver with Four Integrated LDOs

LM3537
www.ti.com
SNVS634B – JUNE 2011 – REVISED MAY 2013
VOLTAGE REGULATORS ELECTRICAL CHARACTERISTICS⁽¹⁾⁽²⁾
Unless otherwise noted, V_{IN_A}= V_{IN_B} = V_{IN_C} = 3.6V, C_{IN_A} = 1 µF, C_{IN_B} = 100 nF, C_{IN_C} = 2.2 µF, C_LDOX= 1 µF, HWEN = high.
Limits in standard typeface are for T_J = 25°C, and limits in boldface type apply over the operating ambient temperature range
(-30°C to +85°C).⁽³⁾
Symbol
Parameter
Condition
Min Typ
Max
Units
LDO1
V_OUT
Output Voltage Accuracy
Default Output Voltage
I_OUTLDO = 1 mA, V_OUTLDO = 2.80V
−2
+2
%
−3
+3
2.80
V
I_OUT
V_DO
ΔV_OUT
PSRR
Output Current
Output Current Limit (short circuit)
Dropout Voltage
Line Regulation
Load Regulation
Power Supply Ripple Rejection Ratio
1.8V ≤ V_{IN_C} ≤ 5.5V
V_OUTLDO = 0V
I_OUTLDO = 300 mA
V_OUTLDO + 0.5V ≤ V_{IN_C} ≤ 4.5V
I_OUTLDO = 1 mA
1 mA ≤ I_OUTLDO ≤ 300 mA
f = 100Hz,
C_LDO1 = 1 µF,
I_OUTLDO = 20 mA
Output Voltage = 1.20V
300
mA
600
mA
220
300
mV
2
mV
20
65
dB
LDO2, LDO3, LDO4
Output Voltage Accuracy
I_OUTLDO = 1 mA, V_OUTLDO = 2.80V
−2
+2
%
−3
+3
V_OUT
Default Output Voltage
LDO2
LDO3
LDO4
1.80
V
1.80
V
2.80
I_OUT
V_DO
ΔV_OUT
PSRR
Output Current
Output Current Limit (short circuit)
Dropout Voltage
Line Regulation
Load Regulation
Power Supply Ripple Rejection Ratio
1.8V ≤ V_{IN_C} ≤ 5.5V
V_OUTLDO = 0V
I_OUTLDO = 150 mA
V_OUTLDO + 0.5V ≤ V_{IN_C} ≤ 4.5V
I_OUTLDO = 1mA
1mA ≤ I_OUTLDO ≤ 150 mA
f = 100 Hz,
C_LDOX = 1µF,
I_OUTLDO = 20 mA
Output Voltage = 1.20V
150
mA
400
mA
100
200
mV
2
mV
10
65
dB
LDO Combined Common Electrical Characteristics
All LDOs Disabled
0.2
1
µA
I_GND
Ground Pin Current (GND and PGND-
pin)
Note: I_OUTLDOX = 0mA
One LDO Enabled
Two LDOs Enabled
Three LDOs Enabled
70
130
100
µA
130
Four LDOs Enabled
160
C_LDOX = 1µF, I_OUTLDO = 150 mA
V_OUT = 2.8V. Enable of First LDO
130
t_STARTUP Turn-on Time from Shut-down⁽⁴⁾
C_LDOX = 1 µF, I_OUTLDO = 150 mA
µs
V_OUT = 2.8V. Enable of Each Subsequent
70
LDO after First Enabled
T_Transient Startup Transient Overshoot
C_LDOX = 1 µF, I_OUTLDO = 150 mA
30
mV
(1) All voltages are with respect to the potential at the GND pins.
(2) Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the most
likely norm.
(3) C_{IN_C}, C_LDOX : Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
(4) Time needed for V_OUTLDO to reach 95% of final value.
Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links: LM3537
Submit Documentation Feedback
7