LP8720TLE/NOPB National Semiconductor, LP8720TLE/NOPB Datasheet - Page 5
![IC REG BUCK 5-LDO I2C 20USMD](/photos/6/99/69996/tla2011a_sml.jpg)
LP8720TLE/NOPB
Manufacturer Part Number
LP8720TLE/NOPB
Description
IC REG BUCK 5-LDO I2C 20USMD
Manufacturer
National Semiconductor
Datasheet
1.LP8720TLENOPB.pdf
(24 pages)
Specifications of LP8720TLE/NOPB
Topology
Step-Down (Buck) Synchronous (1), Linear (LDO) (5)
Function
Any Function
Number Of Outputs
6
Frequency - Switching
2MHz
Voltage/current - Output 1
0.8 V ~ 2.3 V, 400mA
Voltage/current - Output 2
1.2 V ~ 3.3 V, 300mA
Voltage/current - Output 3
1.2 V ~ 3.3 V, 300mA
W/led Driver
No
W/supervisor
No
W/sequencer
Yes
Voltage - Supply
2.7 V ~ 4.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-MicroSMD
Voltage - Output
0.8 ~ 2.3 V
Voltage - Input
3 ~ 4.5 V
Applications
Converter, Power Requirement Solution
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LP8720TLETR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LP8720TLE/NOPB
Manufacturer:
TI
Quantity:
118 432
Part Number:
LP8720TLE/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
POWER-ON AND POWER-OFF SEQUENCES
t
t
Note 1 START UP and SHUT DOWN sequences are defined by registers. Sequences given here are valid if there the registers
Note 2 The timing showed here define time points when LDO’s and BUCK are enabled/disabled. Enabling /disabling process
Note 3 LDO5 and BUCK are disabled. If LDO5 and/or BUCK are enabled via Serial Interface and startup sequence is not changed
Note 4 At this time point registers 0x09 and 0x0C are reset to POR default values.
Note 5 At this time point registers 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 and 0x08 are reset to POR default values.
BON
S
150 µs – Reference and bias turn ON. Min 100 µs max 200 µs.
25 µs – time step. Time step accuracy is defined by OSC frequency accuracy.
are not rewritten via Serial Interface.
duration depends on loading conditions. Buck startup duration is 140 µs for no load. LDO startup duration is no more than
35 µs. For details please see LDO’s and BUCK electrical specifications.
via Serial interface, then LDO5 and BUCK are disabled with no delay from falling edge on EN-pin.
Start Up Sequence if DEFSEL=VBATT or DEFSEL=Hi-Z
5
www.national.com
30067505