LP3906SQ-JXXI Datasheet, PDF (12/47 Pages) Texas Instruments – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C ompatible

LP3906
SNVS456M – AUGUST 2006 – REVISED MAY 2013
TYPICAL PERFORMANCE CHARACTERISTICS — BUCK
T_A = 25°C unless otherwise noted
Shutdown Current
vs.
Temp
0.15
0.12
VIN = 5.5V
0.09
VIN = 3.6V
0.06
VIN = 2.7V
0.03
1.040
1.035
1.030
1.025
1.020
1.015
1.010
1.005
1.000
0.995
0.990
Output Voltage
vs.
Supply Voltage
(Vout = 1.0 V)
I_OUT = 20 mA
I_OUT = 750 mA
I_OUT = 1.5A
www.ti.com
0.00
-40 -20 0
20 40 60 80
TEMPERATURE (°C)
Figure 12.
Output Voltage
vs.
Supply Voltage
(Vout = 1.8V)
1.835
1.830
1.825
1.820
I_OUT = 750 mA
I_OUT = 1.5 A
I_OUT = 20 mA
1.815
1.810
1.805
1.800
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
Figure 14.
Buck 1 Efficiency
vs
Output Current
(Forced PWM Mode, Vout =1.2V, L= 2.2µH)
100
90
80
V_IN = 2.8V
70
60
V_IN = 5.5V
50
40
V_IN = 3.6V
30
20
10
0
10 ^-3 10 ^-2 10 ^-1 10⁰ 10¹ 10² 10³ 10⁴
OUTPUT CURRENT (mA)
Figure 16.
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
Figure 13.
3.550
3.540
3.530
Output Voltage
vs.
Supply Voltage
(Vout = 3.5V)
I_OUT = 20 mA
I_OUT = 1.5A
3.520
3.510
3.500
3.490
4.0
I_OUT = 750 mA
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
Figure 15.
Buck 1 Efficiency
vs
Output Current
(Forced PWM Mode, Vout =2.0V, L= 2.2µH)
100
90
V_IN = 2.8V
80
70
V_IN = 5.5V
60
50
40
V_IN = 3.6V
30
20
10
0
10^-2 10^-1 10⁰ 10¹ 10² 10³ 10⁴
OUTPUT CURRENT (mA)
Figure 17.
12
Submit Documentation Feedback
Product Folder Links: LP3906
Copyright © 2006–2013, Texas Instruments Incorporated