LP3971SQ-G824/NOPB National Semiconductor, LP3971SQ-G824/NOPB Datasheet - Page 15

• Manufacturer Part Number: LP3971SQ-G824/NOPB
• Description: IC PMU MULTI FUNCT PROGR 40-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3971SQ-G824/NOPB

• Applications: Processor
• Current - Supply: 60µA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-LLP
• For Use With: LP3971SQ-B410EV - BOARD EVALUATION LP3971SQ-B410
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP3971SQ-G824TR

V
Eff
I
f
I
I
R
R
T
C
C
SHDN
OSC
PEAK
Q
ON
OUT
DSON
DSON
IN
O
Buck Converters SW1, SW2, SW3
Unless otherwise noted, V
normal type apply for T
−40°C to +125°C. (Notes 2, 6, 12) and (Note 13).
Buck 1 Output Efficiency vs. Load Current Varied from 1mA to 1.5 Amps
Symbol
(P)
(N)
V
IN
= 3, 3.5 volts V
Output Voltage Accuracy
Efficiency
Shutdown Supply Current
Sync Mode Clock Frequency
Internal Oscillator Frequency
Peak Switching Current Limit
Quiescent Current “On”
Pin-Pin Resistance PFET
Pin-Pin Resistance NFET
Turn On Time
Input Capacitor
Output Capacitor
J
= 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation,
Parameter
IN
OUT
= 3.6V, C
= 1.4 volts Forced PWM
IN
= 10 μF, C
Default V
Load Current = 500 mA
EN is de-asserted
Synchronized from 13 MHz System
Clock
No Load PFM Mode
No Load PWM Mode
Start up from Shut-down
Capacitance for Stability
Capacitance for Stability
20180734
OUT
= 10 μF, L
OUT
Conditions
15
OUT
= 2.2 μH ceramic. Typical values and limits appearing in
V
IN
= 4.0, 4.5 volts V
10.4
Min
−3
8
8
OUT
= 1.4 volts Forced PWM
Typ
200
240
200
500
0.1
2.0
2.1
95
13
21
Max
15.6
2.4
+3
20180735
www.national.com
Units
MHz
MHz
μsec
mΩ
mΩ
μA
μA
µF
µF
%
%
A