LP3906SQ-JXXI Datasheet, PDF (9/47 Pages) Texas Instruments – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C ompatible

LP3906
www.ti.com
SNVS456M – AUGUST 2006 – REVISED MAY 2013
BUCK CONVERTERS SW1, SW2
Unless otherwise noted, V_IN = 3.6, C_IN = 10 µF, C_OUT = 10 µF, L_OUT = 2.2 µH ceramic. 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 +125°C. ^{(1) (2) (3) (4) (5)}
Parameter
Test Conditions
Min
Typ
Max Units
V_OUT
Eff
Output Voltage Accuracy
Line Regulation
Load Regulation
Efficiency
Default V_OUT
2.7< V_IN < 5.5
I_O =10 mA
100 mA < I_O < I_MAX
Load Current = 250 mA
−3
+3
%
0.089
%/V
0.0013
96
%/mA
%
I_SHDN
f_OSC
Shutdown Supply Current
Sync Mode Clock Frequency
EN is de-asserted
Synchronized from 13 MHz system
clock
0.01
2.0
µA
MHz
Internal Oscillator Frequency
2.0
MHz
I_PEAK
I_Q ⁽⁵⁾
Peak Switching Current Limit
Quiescent Current “On”
No load PFM Mode
2.0
A
33
µA
R_DSON (P)
Pin-Pin Resistance PFET
200
mΩ
R_DSON (N)
Pin-Pin Resistance NFET
180
mΩ
T_ON
Turn On Time
Start up from shut-down
500
µs
C_IN
Input Capacitor
Capacitance for stability
10
µF
C_O
Output Capacitor
Capacitance for stability
10
µF
(1) All voltages are with respect to the potential at the GND pin.
(2) Min and Max limits are ensured by design, test, or statistical analysis. Typical numbers are not specifications, but do represent the most
likely norm.
(3) C_IN, C_OUT: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
(4) The device maintains a stable, regulated output voltage without a load.
(5) The Iq can be defined as the standing current of the LP3906 when the I2C bus is active and all other power blocks have been disabled
via the I2C bus, or it can be defined as the I2C bus active, and the other power blocks are active under no load condition. These two
values can be used by the system designer when the LP3906 is powered using a battery. If the user plans to use the HW enable pins to
disable each block of the IC please contact the factory applications for IQ details.
I/O ELECTRICAL CHARACTERISTICS
Unless otherwise noted: 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, T_J = 0°C to +125°C. ⁽¹⁾
Parameter
Test Conditions
Limit
Min
Max
Units
V_IL
Input Low Level
V_IH
Input High Level
0.4
V
1.2
V
(1) This specification is ensured by design.
Copyright © 2006–2013, Texas Instruments Incorporated
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