LP8720TLE NSC [National Semiconductor], LP8720TLE Datasheet - Page 14

• Manufacturer Part Number: LP8720TLE
• Description: One Step-Down DC/DC and Five Linear Regulators with I2C Compatible Interface
• Manufacturer: NSC [National Semiconductor]

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V
V
V
V
V
I
R
R
f
Efficiency
T
LIM_PWM
OSC
STUP
FB
BUCK
VOUT,PFM
OUT
OUT
DSON(P)
DSON(N)
Buck Converter
Unless otherwise noted, V
values and limits appearing in normal type apply for T
temperature range for operation, T
Symbol
Feedback Voltage
Output Voltage, PWM Mode 3.0V
Output Voltage regulation in
PFM mode relative to
regulation in PWM mode
Line Regulation
Load Regulation
Switch Peak Current Limit
P channel FET on
resistance
N channel FET on
resistance
Internal Oscillator
Frequency
Start Up Time
BUCK1_Vx
5h’0A
5h’0B
5h’0C
5h’0D
5h’0E
5h’0F
5h’00
5h’01
5h’02
5h’03
5h’04
5h’05
5h’06
5h’07
5h’08
5h’09
Parameter
VBATT
Buck Output Voltage Programming in Register 0x06 and 0x07
=V
VINB
J
= -40 to +125°C.
External resistor divider
=V
VIN1
3.0V
(Note
3.0V
I
100mA
PWM Mode @ 400 mA
3.0V
V
PWM Mode
I
V
I
V
I
OUT
OUT
OUT
OUT
IN
OUT
OUT
=V
= 3.6V, I
= 10 mA
= 5mA, PFM-mode
= 200mA, PWM-mode
= 0, V
≤
≤
≤
≤
= 1.2V
= 1.2V
V
7)
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
VIN2
V
V
V
V
OUT
≤
IN
IN
IN
IN
=3.6V, GND=GNDB=0V, C
I
OUT
OUT
(Note
≤
≤
≤
≤
J
D
=25°C. Limits appearing in boldface type apply over the entire junction
(Note
(Note
4.5V external resistor divider
4.5V
4.5V
4.5V
= 100mA
≤
= 1.2V
300mA
6,
Conditions
7)
7)
Note
14
(Note
10)
7)
BUCK1_Vx
5h’1C
5h’1D
5h’1A
5h’1B
5h’1E
5h’1F
5h’10
5h’11
5h’12
5h’13
5h’14
5h’15
5h’16
5h’17
5h’18
5h’19
VBATT
=C
VIN1
=C
0.14
0.09
Typ
900
310
160
140
0.5
1.2
1.5
88
90
2
VIN2
=2.2 µF, C
0.485
1.164
Min
500
1.9
1.7
V
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.30
OUT
Limit
VINB
=10 µF. Typical
0.515
1.236
Max
500
300
2.1
2.3
%/mA
Units
MHz
%/V
mΩ
mΩ
mA
µs
%
%
V
V