lp8765rlx National Semiconductor Corporation, lp8765rlx Datasheet - Page 17

• Manufacturer Part Number: lp8765rlx
• Description: High Performance Power Management Unit For Handset Applications
• Manufacturer: National Semiconductor Corporation

V
V
V
V
V
I
R
R
f
η
T
LIM_PWM
OSC
Symbol
STUP
FB 1
FB 2
OUT,PFM
OUT
OUT
DSON (P)
DSON (N)
Unless otherwise noted, V
=0V, C
pearing in normal type apply for T
operation, T
BUCK1 has two pre-programmed voltages BUCK1 NORMAL
& BUCK1 SLEEP at 0x1C.
NOTE: If user does not want this DVS function, just program BUCK1 SLEEP = BUCK1 NORMAL = 1.2V.
SLEEP_N
BUCK#
Buck1
Buck2
VIN_CHG
Feedback Voltage (Buck1)
Feedback Voltage (Buck1)
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
Efficiency
Startup time
J
= −40°C to +125°C.
=C
VIN_B
High
Parameter
Low
1=C
IO&Memory
(Note
Function
BATT
(Note
CORE1
VIN_B2
(=V
7)
=C
7)
(Note
VIN1
J
=25°C. Limits appearing in boldface type apply over the entire junction temperature range for
BUCK
=V
1=C
6,
VIN2
Note
BUCK ELECTRICAL CHARACTERISTICS
BUCK2
V
V
(Note
3.0V
I
100 mA
PWM mode @ 600 mA
3.0V
PWM mode @ 500 mA
3.0V
V
PWM mode
I
V
I
V
I
V
V
=V
OUT
OUT
OUT
OUT
I (mA)
OUT
OUT
IN
OUT
OUT
OUT_BUCK1
OUT_BUCK2
600
500
VIN3
11)
= 3.6V, I
= 10 mA
= 5 mA, PFM mode
= 300 mA, PWM mode
= 0
Output Voltage Programming
DVS FUNCTION FOR BUCK1
= C
≤
≤
≤
= 1.2V
= 1.8V
= 1.35V
= 1.35V
7)
=V
V
V
V
≤
VIN1
IN
IN
IN
VIN_B1
I
≤
OUT
≤
≤
= 1.2V
= 1.8V
OUT
=C
5.5V
4.2V (Buck1)
4.2V (Buck2)
(Note
(Note
=V
VIN2
≤
0.8-1.45 (50 mV step)
0.8-1.45 (50 mV step)
Conditions
= 100 mA
Output Voltage (V)
300 mA
VIN_B2
=10 μF, C
(Note
17
7)
7)
) =3.7V, GND (=GND_B1=GND_B2=GND_LDO=GND_SINK)
7)
Buck1 V
Buck1 V
LDOx
=C
OUT
VTRM
OUT
= BUCK1 NORMAL
=C
= BUCK1 SLEEP
COIN
Startup Default
120
140
1025
=1μF. Typical values and limits ap-
Typ.
0.14
0.09
925
300
150
1.2
1.8
1.5
88
90
2
ON
ON
1.164
1.746
Min
710
630
1.9
Limit
Enable Control
1.236
1.854
1500
1400
Max
2.1
S/I
S/I
www.national.com
%/mA
Units
MHz
%/V
mΩ
mA
µs
%
%
V