LP3910 Datasheet, PDF (13/72 Pages) Texas Instruments – Power Management IC for Hard-Drive-Based Portable Media Players

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LP3910
SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015
7.16 Electrical Characteristics: Buck2 Converter
Unless otherwise noted, VIN3 = 3.6 V, V_OUT = default value, C_VIN3 = 10 µF, C_SW1 = 10 µF, L_SW2 = 2.2 µH. Typical limits apply
for T_J = 25°C; minimum and maximum limits apply for T_J = 0°C to 125°C, unless otherwise specified. Modulation mode is
PWM mode with automatic switch to PFM at light loads.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
VIN3
Input voltage
2.7
6
V
V_OUT Range
Output voltage programming
range
1.8 V – 3.3 V in 100-mV steps
0.8
2
V
Static output voltage tolerance
I_OUT = 200 mA including line and
load regulation
–3%
3%
ΔV_OUT
I_OUT
Line regulation
Load regulation
Continuous output current
Peak output current limit
I_OUT = 10 mA
V_IN3 = 2.5 V − V_DD
100 mA < I_OUT < 300 mA
0.2
0.002
600
850
1000
1150
%/V
%/mA
mA
mA
I_PFM
Maximum I_LOAD, PFM mode
I_Q
Quiescent current
I_OUT = 0 mA
Buck2 disabled
75
mA
30
90
µA
1
F_OSC
η
T_ON
Internal oscillator frequency
Peak efficiency
Turnon time
PWM mode
To 95% level⁽¹⁾
2
90%
MHz
1
ms
(1) This specification is ensured by design..
7.17 Electrical Characteristics: Buck-Boost
Unless otherwise noted, VIN4 = 3.6 V, C_VIN4 = 10 µF, C_BB = 22 µF, L_BB = 2.2 µH. Typical limits apply for T_J = 25°C; minimum
and maximum limits apply for T_J = 0°C to 125°C, unless otherwise specified. Modulation mode is PWM mode with automatic
switch to PFM at light loads.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
VIN4
Input voltage
I_OUTMAX = 1000 mA
2.9
I_OUTMAX = 800 mA
2.7
V_OUT Range
Output voltage programming
range
T_J = 25°C
1.80 V to 3.30 V in 50-mV steps
1.8
5.7
V
5.7
V
3.3
V
ΔV_OUT
I_OUT
I_PFM
I_Q
Static output voltage tolerance
Line regulation
Load regulation
Continuous output current
Peak inductor current limit
Maximum I_LOAD, PFM mode
Quiescent current
I_OUT = 0 mA to 1000 mA including
line and load regulation
I_OUT = 10 mA
100 mA < I_OUT < 1000 mA
V_OUT = 3.3 V
1-A load at V_IN = 2.7 V
I_OUT = 0 mA PFM no switching
Buck-Boost disabled
–4%
1000
1800
0.2
0.0016
75
80
4%
2400
%/V
%/mA
mA
mA
mA
µA
1
F_OSC
η
T_ON
Internal oscillator frequency
Peak efficiency
Turnon time
PWM mode
To 95% level⁽¹⁾
2
93%
MHz
1 ms
(1) This specification is ensured by design.
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