LP3906SQ-JXXI Datasheet, PDF (7/47 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
OPERATING RATINGS^(1)(2)(3)
Bucks
V_IN
V_EN
Junction Temperature (T_J) Range
Ambient Temperature (T_A) Range⁽⁴⁾
Thermal Properties^{(5)(6) (4)}
2.7V to 5.5V
0 to (V_IN + 0.3V)
−40°C to +125°C
−40°C to +85°C
Junction-to-Ambient Thermal Resistance
(θ_JA)NHZ0024B
28°C/W
(1) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under
which operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits
and associated test conditions, see the Electrical Characteristics.
(2) All voltages are with respect to the potential at the GND pin.
(3) Min and Max limits are ensured by design, test, or statistical analysis. Typical numbers are not specifications, but do represent the most
likely norm.
(4) Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power
dissipation exists, special care must be paid to thermal dissipation issues in board design.
(5) Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T_J = 160°C (typ.) and
disengages at T_J = 140°C (typ.)
(6) In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may
have to be derated. Maximum ambient temperature (T_A-MAX) is dependent on the maximum operating junction temperature (T_J-MAX-OP =
125°C), the maximum power dissipation of the device in the application (P_D-MAX), and the junction-to-ambient thermal resistance of the
part/package in the application (θ_JA), as given by the following equation: T_A-MAX = T_J-MAX-OP − (θ_JA × P_D-MAX). See APPLICATION
NOTES.
GENERAL ELECTRICAL CHARACTERISTICS^(1)(2)(3)(4)
Unless otherwise noted, V_IN = 3.6V, 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.
Parameter
Test Conditions
Min
Typ
Max Units
V_POR
T_SD
T_SDH
Power-On Reset Threshold
Thermal Shutdown Threshold
Themal Shutdown Hysteresis
V_DD Falling Edge
1.9
V
160
°C
20
°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under
which operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits
and associated test conditions, see the Electrical Characteristics.
(2) All voltages are with respect to the potential at the GND pin.
(3) Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not specified, but do represent the most
likely norm.
(4) This specification is ensured by design.
I²C COMPATIBLE INTERFACE ELECTRICAL SPECIFICATIONS⁽¹⁾
Unless otherwise noted, V_IN = 3.6V. 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
Parameter
Test Conditions
Min
Typ
Max Units
F_CLK
t_BF
t_HOLD
t_CLKLP
t_CLKHP
t_SU
t_DATAHLD
t_DATASU
T_SU
T_TRANS
Clock Frequency
Bus-Free Time Between Start and Stop
Hold Time Repeated Start Condition
CLK Low Period
CLK High Period
Set Up Time Repeated Start Condition
Data Hold time
Data Set Up Time
Set Up Time for Start Condition
Maximum Pulse Width of Spikes that
Must be Suppressed by the Input Filter of
Both DATA & CLK Signals.
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
See ⁽¹⁾
400
kHz
1.3
µs
0.6
µs
1.3
µs
0.6
µs
0.6
µs
0
µs
100
ns
0.6
µs
50
ns
(1) This specification is ensured by design.
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