參數(shù)資料
型號： LQA48B
廠商： National Semiconductor Corporation
英文描述： Cellular Phone Power Management Unit
中文描述： 蜂窩電話電源管理單元
文件頁數(shù)： 6/32頁
文件大?。?/td> 761K
代理商： LQA48B
Electrical Characteristics
(Continued)
Unless otherwise noted, V
IN
= 2.5V to 5.5V, C
(IN1–6) = 4.7 μF, C
(V
and V
O9
) = 4.7 μF, C
(V
, V
, V
, V
O8
,
V
and V
) = 2.2 μF, C
(V
to V
) = 1 μF, C
(V
) = 1 μF ceramic, C
= 0.1 μF. Typical values and limits
appearing in normal type apply for T
= 25C. Limits appearing in
boldface
type apply over the entire junction temperature
range for operation, 40 to +125C. (Notes 2, 8, 9, 10)
Symbol
LOGIC AND CONTROL INPUTS
V
IH
Input High Level
Parameter
Condition
Min
Typ
Max
Units
PS-HOLD, ON, BSNS, HF-PWR,
RTC_ALARM, SDA, SCL, V
O5
-EN,
V
O6
-EN.
2.5V
≤
V
BATT
≤
5.5V
SDA, SCL
0V
≤
V
IN
≤
5.5V
0V
≤
V
IN
≤
V
BATT
2.0
V
I
IL
Logic Input Current
5
+5
μA
PS-HOLD Input Current
ON, HF_PWR Pull-Down
Resistance to GND
V
O5
-EN, V
O6
-EN, RTC_ALARM
Pull Down Resistance to GND
LOGIC AND CONTROL OUTPUTS
V
OL
ON Output Low Level
I
LEAKAGE
ON Open Drain Leakage
I
O-MAX
ON, RESET, OUT (COMP1),
OUT (COMP2) Output
Maximum Sink/Source Current
5
+5
μA
R
IN
200
k
1700
k
I
SINK
= 1 mA
V
ON
= 4.2V
0.4
5
V
μA
5
mA
V
O1
LDO Electrical Characteristics
Unless otherwise noted, V
= V
= 3.6V. Typical values and limits appearing in normal type apply for T
= 25C. Limits ap-
pearing in
boldface
type apply over the entire junction temperature range for operation, 40 to +85C. (Notes 2, 8, 9)
Symbol
V
OUT
Accuracy
V
OUT
Range
I
OUT
Parameter
Condition
Min
Typ
Max
Units
Output Voltage
1 mA
≤
I
OUT
≤
200 mA, V
OUT
= 2.2V
3.0V
≤
V
BATT
= V
IN
≤
5.5V
0 μA
≤
I
OUT
≤
200 mA
Programming Resolution = 100 mV
(V
OUT
+ 0.25V, 3.0V)
MAX
≤
V
BATT
V
BATT
= V
IN
≤
5.5V
V
OUT
= 0V
I
OUT
= 100 mA
(V
OUT
+ 0.25V, 3.0V)
MAX
≤
V
BATT
V
BATT
= V
IN
≤
5.5V, I
OUT
= 100 mA
V
IN
= 3.6V, 1 mA
≤
I
OUT
≤
200 mA
10 Hz
≤
f
≤
100 kHz,
C
OUT
= 4.7 μF
f = 217 Hz, C
OUT
= 4.7 μF
3
±
1.0
+3
%
Programmable Output Voltage
Range
Output Current
1.5
1.8
3.0
V
200
mA
Output Current Limit
Dropout Voltage
Line Regulation
780
70
V
IN
–V
OUT
V
OUT
254
mV
3
mV
Load Regulation
Output Noise Voltage
10
e
N
27
μV
RMS
PSRR
Power Supply Ripple
Rejection Ratio
Output Capacitance
Output Capacitor ESR
60
dB
C
OUT
1 mA
≤
I
OUT
≤
200 mA
2
5
20
500
μF
m
t
START-UP
Start-Up Time from Shutdown
ON-signal
Note:
This LDO will be ON after start up by default.
Note:
(V
OUT
+ 0.25V, 3.0V)
MAX
means greater of the two. That is 3.0V if V
OUT
<
2.75V.
Note:
The PMU can switch off if battery voltage is below 3.0V due to under voltage lockout designed to protect the battery from excessive discharge at low voltages.
Note:
The start-up time (t
START-UP
) is defined as the time between the rising edge of ON-, HF_PWR-, RTC ALARM- or CHG_IN- pins going high and activating the
power-up sequence of the LP3941A.
C
OUT
= 4.7 μF, I
OUT
= 200 mA (Note
10)
80
120
180
μs
L
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