LP3910 Datasheet, PDF (12/72 Pages) Texas Instruments – Power Management IC for Hard-Drive-Based Portable Media Players

LP3910
SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015
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7.14 Electrical Characteristics: LDO2 Low Dropout Linear Regulator
Unless otherwise noted VIN1 = 3.6V, I_MAX = 150 mA, V_OUT = default value, C_VDD = 10 µF, C_LDO2 = 1 µF, ESR = 5 mΩ to 500
mΩ, C_VREFH = 100 nF. Typical limits apply for T_J = 25°C; minimum and maximum limits apply for T_J = 0°C to 125°C, unless
otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
VIN2
Operational voltage
2.5
6
V
V_OUT range
Output voltage programming
range
T_A = 25°C
1.3 V to 3.3 V in 100-mV steps
1.3
3.3
V
V_OUT accuracy
ΔV_OUT
Output voltage accuracy
(default V_OUT)
Line regulation
Load regulation
I_SC
V_IN – V_OUT
Short-circuit current limit
Dropout voltage
PSRR
Power supply ripple rejection
e_N
Analog supply output noise
voltage
1 mA ≤ I_OUT ≤ I_MAX over full line
and load regulation
V_IN = (V_OUT + 500 mV) to 5.5 V,
Load current = I_MAX
V_IN = 3.6 V,
Load current = 1 mA to I_MAX
V_OUT = 0 V
Load current = I_MAX
F = 1 kHz, load current = I_MAX
F = 10 kHz, load current = I_MAX
10 Hz < F < 100 kHz
–3%
3%
3
mV
10
mV
600
750
mA
60
150
mV
50
dB
35
50
µV_RMS
R_SHUNT
LDO output impedance
LDO disabled, V_OUT = default
value
200
Ω
7.15 Electrical Characteristics: Buck1 Converter
Unless otherwise noted, VIN2 = 3.6 V, V_OUT = default value, C_VIN2 = 10 µF, C_SW1 = 10 µF, L_SW1 = 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
VIN2
Input voltage
2.7
6
V
V_OUT range
Output voltage programming
range
T_J = 25°C
0.8 V to 2 V in 50-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_IN2 = 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
BUCK1 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.
12
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