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LP3927 Datasheet(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LP3927
Description  Cellular/PCS System Power Management IC
PDF  16 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP3927 Datasheet(HTML) 6 Page - National Semiconductor (TI)

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Electrical Characteristics, Digital Interface
Symbol
Parameter
Conditions
Typical
Limit
Units
Min
Max
V
OL
Logic Low Output
RST and IRQ
I
LOAD = 250 µA
150
mV
V
IH
Logic High Input
KYBD and VEXT
0.7 V
DD
V
EN3–5, PS_HOLD
1.4
LED_EN
0.85V
DD
V
IL
Logic Low Input
KYBD and VEXT
0.2 V
DD
V
EN3–5, PS_HOLD
0.4
LED_EN
0.2 V
DD
I
LEAKAGE
Input Leakage Current
VEXT, PS_HOLD, IRQ,
KYBD, EN3–5, 0V
≤ V
DD
≤ 5.5V
−10
+10
µA
Electrical Characteristics, Error Flag
Symbol
Parameter
Conditions
Typical
Limit
Units
Min
Max
V
Th-H
Error Flag High
V
o1 and Vo2 Outputs (Note 11)
95
92
98
% V
OUT
V
Th-L
Error Flag Low
90
89
92
t
DELAY-H
(Note 12)
6
0
10
µs
t
DELAY-L
6
0
10
µs
Keyboard Debounce Delay
(Note 13)
32
16
64
ms
VEXT Debounce Delay
(Note 13)
32
16
64
ms
R
DELAY
RST Reset Delay
(Note 14)
20
10
40
ms
t
DELAY
LDO Delay, standard
(Note 15)
125
0
250
µs
LDO Delay, optional
10
5
20
ms
t
Hold-UP
PS_HOLD Input
(Note 16)
500
250
1000
ms
Electrical Characteristics, Backlight LED Driver
Symbol
Parameter
Conditions
Typical
Limit
Units
Min
Max
I
LED
Drive Current
V
LED = 1V, RPGM = 130k
Ω
150
125
175
mA
Electrical Characteristics, Operational Amplifier
Unless otherwise noted, V
OP_AMP_VDD = 3.3V, VCM =VOUT =VOP_AMP_VDD/2 and RLOAD > 1M
Ω. 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, −40˚C to +85˚C. (Note 7)
Symbol
Parameter
Conditions
Typical
Limit
Units
Min
Max
V
DD
OP_AMP_V
DD
3.3
3
5.5
V
V
OS
Input Offset Voltage
1.2
10
mV
TC V
OS
Offset Voltage Drift
10
µV/˚C
I
B
Input Bias Current
0.2
nA
I
OS
Input Offset Current
0.1
nA
R
IN
Input Resistance
>1G
Ω
CMRR
Common-Mode Rejection Ratio
0V
≤ V
CM
≤ 2.7V
70
dB
PSRR
Power Supply Rejection Ratio
V
OP_AMP_VDD = 2.7V to
3.3V
,V
CM =0
60
dB
C
IN
Common-Mode Input Capacitor
3
pF
www.national.com
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