LP3918 Datasheet, PDF (7/30 Pages) National Semiconductor (TI) – Battery Charge Management and Regulator Unit

Symbol
Parameter
Condition
Typ
LOGIC AND CONTROL INPUTS (LDO2 at 3.0V)
V_IL
Input Low Level
PS_HOLD, SDA, SCL, RX_EN,
TCXO_EN, TX_EN
PWR_ON, HF_PWR
V_IH
Input High Level
PS_HOLD, SDA, SCL, RX_EN,
TCXO_EN, TX_EN
PWR_ON, HF_PWR
I_IL
Logic Input Current
All logic inputs except PWR_ON
and HF_PWR
R_IN
Input Resistance
0V ≤ V_INPUT ≤ V_BATT
PWR_ON, HF_PWR Pull-Down
500
resistance to GND(Note 7)
LOGIC AND CONTROL OUTPUTS (LDO2 at 3.0V)
V_OL
Output Low Level
PON_N, RESET_N, SDA,
ACOK_N
V_OH
Output High Level
I_OUT = 2mA
PON_N, RESET_N, ACOK_N
I_OUT = 2mA
(Not applicable to Open Drain
Output SDA)
Limit
Min
Max
0.75*
V_LDO2
0.75*
V_BATT
-5
0.25*
V_LDO2
0.25*
V_BATT
+5
Units
V
V
V
V
µA
kΩ
0.25*
V
V_LDO2
0.75*
V
V_LDO2
LDO1 (CORE) Electrical Characteristics
Unless otherwise noted, V_IN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, C_VIN1-2=10µF, C_LDOX=1µF. V_OUT1 set to 3.0V output. Note
V_INMIN is the greater of 3.0V or V_OUT1+ 0.5V. Typical values and limits appearing in normal type apply for T_J = 25°C. Limits appearing
in boldface type apply over the entire junction temperature range for operation, T_a = T_J = −40°C to +125°C. (Note 6)
Symbol
Parameter
Condition
Limit
Typ
Units
Min
Max
V_OUT1
Output Voltage Accuracy
I_OUT1 = 1mA, V_OUT1= 3.0V
−2
+2
%
−3
+3
Output Voltage
Default
1.8
V
I_OUT1
Output Current
V_INMIN ≤ V_IN ≤ 5.5V
Output Current Limit
V_OUT1 = 0V
600
V_DO1
Dropout Voltage
I_OUT1 = 300mA, (Note 8)
200
ΔV_OUT1
Line Regulation
V_INMIN ≤ V_IN ≤ 5.5V
2
I_OUT1 = 1mA
Load Regulation
1mA ≤ I_OUT1 ≤ 300mA
20
e_n1
Output Noise Voltage
10Hz ≤ f ≤ 100KHz,
45
C_{OUT = 1µF (Note 7)}
PSRR
Power Supply Rejection Ratio F = 10kHz, C_OUT = 1µF
65
I_OUT1 = 20mA (Note 7)
t_START-UP
Start-Up Time from Shut-down C_OUT = 1µF, I_OUT1 = 300mA
60
(Note 7)
300
mA
280
mV
mV
mV
µV_RMS
dB
170
µs
T_Transient
Start-Up Transient Overshoot
C_OUT = 1µF, I_OUT1 = 300mA
60
(Note 7)
120
mV
7
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