LTC3838-1_15 Datasheet, PDF (2/52 Pages) Linear Technology – Dual, Fast, Accurate Step-Down DC/DC Controller with Dual Differential Output Sensing

LTC3838-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V_IN Voltage.................................................. –0.3V to 40V
BOOST1, BOOST2 Voltages........................ –0.3V to 46V
SW1, SW2 Voltages....................................... –5V to 40V
INTV_CC, DRV_CC1, DRV_CC2, EXTV_CC, PGOOD1,
PGOOD2, RUN1, RUN2, (BOOST1-SW1),
(BOOST2-SW2), MODE/PLLIN Voltages....... –0.3V to 6V
SENSE1⁺, SENSE2⁺,SENSE1^–, SENSE2^–
Voltages........................................................ –0.6V to 6V
V_OUTSENSE1+ Voltage................ –0.6V to (INTV_CC + 0.3V)
V_{OUTSENSE1–} Voltage......................–0.6V to V_OUTSENSE1+
TRACK/SS1, TRACK/SS2 Voltages............... –0.3V to 5V
DTR1, DTR2, PHASMD, RT, V_RNG, V_DFB2+, V_DFB2–,
ITH1, ITH2 Voltages................. –0.3V to (INTV_CC + 0.3V)
Operating Junction Temperature Range
(Notes 2, 3, 4)......................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
V_DFB2+ 1
V_RNG 2
ITH2 3
TRACK/SS2 4
MODE/PLLIN 5
CLKOUT 6
SGND 7
RT 8
PHASMD 9
ITH1 10
TRACK/SS1 11
V_OUTSENSE1+ 12
38 37 36 35 34 33 32
39
PGND
13 14 15 16 17 18 19
31 TG2
30 SW2
29 BG2
28 DRV_CC2
27 EXTV_CC
26 INTV_CC
25 PGND
24 V_IN
23 DRV_CC1
22 BG1
21 SW1
20 TG1
UHF PACKAGE
38-LEAD (5mm × 7mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD (PIN 39) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3838EUHF-1#PBF
LTC3838EUHF-1#TRPBF 38381
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 125°C
LTC3838IUHF-1#PBF
LTC3838IUHF-1#TRPBF 38381
38-Lead (5mm × 7mm) 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 non-standard 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/
Table 1. Comparison of LTC3838 Options
PART NUMBER DESCRIPTION
LTC3838
±0.67% Differential Output Regulation on Channel 1
±1% Output Regulation on Channel 2
Separate-Per-Channel Continuous 30mV to 100mV Current Sense Range Controls
LTC3838-1
±0.67% and ±0.75%, Both Differential Output Regulation on Channel 1 and 2
Single-Pin 30mV/60mV Current Sense Range Control
LTC3838-2
±0.67% Differential Output Regulation with Internal Reference on Channel 1
±4mV Differential Output Regulation with External Reference Voltage on Channel 2
Fixed 30mV Current Sense Range
38381f
2
For more information www.linear.com/3838-1