LTC3882_15 Datasheet, PDF (4/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V_CC Supply Voltage..................................... –0.3V to 15V
VINSNS Voltage.......................................... –0.3V to 40V
V_SENSE0–....................................................... –0.3V to 1V
V_SENSEn⁺, I_SENSEn⁺, I_SENSEn^–......................... –0.3V to 6V
V_DD33, FBn, COMPn, TSNSn,
I_AVGn, I_{AVG_GND}.......................................... –0.3V to 3.6V
SYNC, GPIOn, WP, PWMn, ENn,
SHARE_CLK............................................... –0.3V to 3.6V
SCL, SDA, RUNn, ALERT............................ –0.3V to 5.5V
V_DD25, ASELn, V_{OUTn_CFG}, FREQ_CFG,
PHAS_CFG............................................... –0.3V to 2.75V
Operating Junction Temperature Range
(Notes 2, 3)........................................... –40°C to 125°C*
Storage Temperature Range................. –65°C to 150°C*
PIN CONFIGURATION
TOP VIEW
40 39 38 37 36 35 34 33 32 31
COMP0 1
30 FB1
TSNS0 2
29 COMP1
TSNS1 3
28 BG1/EN1
VINSNS 4
I_{AVG_GND} 5
BGO/EN0 6
TGO/PWM0 7
41
GND
(V_SENSE1–)
27 TG1/PWM1
26 V_CC
25 V_DD33
24 SHARE_CLK
SYNC 8
23 WP
SCL 9
SDA 10
22 V_DD25
21 PHAS_CFG
11 12 13 14 15 16 17 18 19 20
*See Derating EEPROM Retention at Temperature in the
Applications Information section for junction temperatures
in excess of 125°C.
UJ PACKAGE
40-LEAD (6mm × 6mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 33°C/W , θ_JC = 2.5°C/W
EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3882EUJ#PBF
LTC3882EUJ#TRPBF
LTC3882UJ
40-Lead (6mm × 6mm) Plastic QFN
–40°C to 125°C
LTC3882IUJ#PBF
LTC3882IUJ#TRPBF
LTC3882UJ
40-Lead (6mm × 6mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range,
V_SENSE1– = I_{AVG_GND} = GND =
otherwise specifications are at T_J = 25°C (Note 2). V_CC = 5V, V_SENSE0+
0V, f_SYNC = 500kHz (externally driven) unless otherwise specified.
=
V_SENSE1+
=
1.8V,
V_SENSE0–
=
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
IC Supply
V_CC
V_{DD33_EXT}
V_UVLO
V_CC Voltage Range
V_DD33 Voltage Range
Undervoltage Lockout Threshold
V_DD33 = Internal LDO
V_CC = V_DD33 (Note 6)
V_DD33 Rising
Hysteresis
l 4.5
13.8
V
l3
3.6
V
l
3
V
42
mV
I_Q
IC Operating Current
t_INIT
Controller Initialization Time
Delay from RESTORE_USER_ALL, MFR_RESET or
V_DD33 > V_UVLO Until TON_DELAY Can Begin
32
mA
70
ms
3882f
4
For more information www.linear.com/LTC3882