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| LP3910SQ-AN Datasheet, PDF (10/60 Pages) National Semiconductor (TI) – Power Management IC for Hard Drive Based Portable Media Players | |||
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LDO2: Low Drop Out Linear Regulator
Unless otherwise noted VIN1 = 3.6V, IMAX = 150 mA, VOUT = Default Value, CVDD = 10 µF, CLDO2 = 1.0 µF, ESR = 5 mâ¦â
500 mâ¦, CVREFH = 100 nF. 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.
Symbol
Parameter
Conditions
Min
Typ
Max Units
VIN2
Operational Voltage Range
2.5
6.0
V
VOUT Range Output Voltage Programming Range
TA = 25°C
1.3
1.3Vâ3.3V in 100 mV Steps
3.3
V
VOUT
Accuracy
Output Voltage Accuracy
(Default VOUT)
1 mA ⤠IOUT ⤠IMAX, Over Full Line
â3
and Load Regulation.
3
%
ÎVOUT
Line Regulation
VIN = (VOUT + 500 mV) to 5.5V,
Load Current = IMAX
3
mV
Load Regulation
VIN = 3.6V,
Load Current = 1 mA to IMAX
10
mV
ISC
Short Circuit Current Limit
VOUT = 0V
600
750
mA
VIN â VOUT Dropout Voltage
Load Current = IMAX
60
150
mV
PSRR
Power Supply Ripple Rejection
F = 1 kHz, Load Current = IMAX
50
dB
F = 10 kHz, Load Current = IMAX
35
eN
Analog Supply Output Noise Voltage 10 Hz < F < 100 kHz
50
µVrms
RSHUNT
LDO Output Impedance
LDO Disabled, VOUT = Default
Value
200
â¦
BUCK1 Converter Electrical Characteristics
Unless otherwise noted, VIN2 = 3.6 V, VOUT = default value, CVIN2 = 10 µF, CSW1 = 10 µF, LSW1 = 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
VIN2
Input Voltage
2.7
6.0
V
VOUT Range Output Voltage Programming Range 0.80Vâ2.00V in 50 mV Steps
0.8
ÎVOUT
Static Output Voltage Tolerance
IOUT = 200 mA, Including Line and
â3
Load Regulation
2.0
V
3
%
Line Regulation
Load Regulation
IOUT
Continuous Output Current
Peak Output Current Limit
IOUT = 10 mA
VIN2 = 2.5V â VDD
100 mA < IOUT < 300 mA
0.2
%/V
0.002
%/mA
600
mA
850
1000 1150
mA
IPFM
Max ILOAD, PFM Mode
IQ
Quiescent Current
IOUT = 0 mA
BUCK1 Disabled
75
mA
30
90
µA
1
FOSC
η
TON
Internal Oscillator Frequency
Peak Efficiency
Turn-on Time
PWM Mode
To 95% Level (Note 9)
2
MHz
90
%
1
ms
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