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LP3913 Datasheet, PDF (12/70 Pages) Texas Instruments – Power Management IC for Flash Memory-Based Portable Media Players
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LP3913
SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013
www.ti.com
BUCK2 CONVERTER ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise noted, VIN3 = 3.6V, VOUT = default value, CVIN3 = 10 µF, CSW1 = 10 µF, LSW2 = 2.2 µH Typical values and
limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction
temperature range for operation, 0°C to +125°C. Modulation mode is PWM mode with automatic switch to PFM at light loads.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
IOUT
Continuous Output
Current
600
mA
Peak Output Current
Limit
850
1000
1150
mA
IPFM
Max ILOAD, PFM
Mode
75
mA
IQ
Quiescent Current
IOUT = 0 mA
30
90
µA
Buck2 Disabled
1
FOSC
Internal Oscillator
Frequency
PWM Mode
2
MHz
η
Peak Efficiency
90
%
TON
Turn-on Time
To 95% Level (1)
1
ms
(1) Specified by design. Not production tested.
BUCK3 ELECTRICAL CHARACTERISTICS
Unless otherwise noted, VIN4 = 3.6V, CVIN4 = 10 µF, CBB = 22 µF, LBB = 2.2 µH Typical values and limits appearing in normal
type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation,
0°C to +125°C. Modulation mode is PWM mode with automatic switch to PFM at light loads.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIN4
VOUT Range
Input Voltage
IOUTMAX = 500 mA
2.7
Output Voltage
1.80V – 3.30V in 50 mV
Programming Range Steps
1.8
5.7
V
3.3
V
ΔVOUT
Static Output Voltage IOUT = 0 mA–500 mA,
Tolerance
Including Line and Load
−4
Regulation
4
%
Line Regulation
IOUT = 10 mA
0.2
%/V
Load Regulation
100 mA < IOUT < 500 mA
0.0016
%/mA
IOUT
Continuous Output
Current
500
mA
Peak Inductor Current VOUT = 3.3V
Limit
1A Load at VIN = 2.7V
900
1200
mA
IPFM
Max ILOAD, PFM
Mode
75
mA
IQ
Quiescent Current
IOUT = 0 mA PFM No
Switching
80
µA
Buck3 Disabled
1
FOSC
Internal Oscillator
Frequency
PWM Mode
2
MHz
η
Peak Efficiency
93
%
TON
Turn-on Time
To 95% Level (1)
1
ms
(1) Specified by design. Not production tested.
12
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