LTC3863_15 Datasheet, PDF (38/38 Pages) Linear Technology – 60V Low IQ Inverting DC/DC Controller

LTC3863
Typical Application
320kHz
1.8pF
0.1µF
180pF _845k
52.3k
Efficiency
90
9
V_IN = 24V
80 VOUT = –150V
8
70
7
EFFICIENCY
60
6
0.47µF
RUN ^CAP
V_IN
PLLIN/MODE
SS
SENSE
39mΩ
C_IN2 +
10µF
50V
×2
V_IN
C_IN3 ^{12V TO 40V}
68µF
63V
50
5
40
PULSE-SKIPPING MODE ⁴
30
Burst Mode OPERATION ₃
20
2
POWER LOSS
10
1
GATE
LTC3863
ITH
FREQ
SGND
V_FBN
PGND ^VFB
Q1 ^D1
L1
1M
15µH
1M
C_OUT1
1µF
250V
×2
C_OUT3
47µF
200V
V_OUT
–150V
40mA
3.3pF
3863 F16a
10.7k
C_IN1: CDE AFK686M63G24T-F
C_IN2: MURATA GRM32ER71H106H
C_OUT1: TDK CGA8P3X7T2E105K/SOFT
C_OUT3: LELON VEJ-470M2DTR-1616
D1: ON SEMI MBRS3201T3G
L1: TOKO 1217AS-H-150M
Q1: VISHAY SI7119
0
0.001
0.01
LOAD CURRENT (A)
Gain/Phase
40
35
V_IN = 24V
V_OUT = –150V
30
25
PHASE
20
15
10
0
0.1
3863 F16b
135
120
105
90
75
60
45
5
30
0
15
–5
GAIN
0
–10
–15
–15
–30
–20
0.1
1
–45
10
100
FREQUENCY (Hz)
3963 F16c
Figure 16. 12V to 40V Input, –150V/40mA Output, 320kHz Inverting Converter
Gain/Phase Measurements Taken with OMICRON Lab Bode 100 Vector Network Analyzer.
Related Parts
PART NUMBER
DESCRIPTION
COMMENTS
LTC3864
Low I_Q, High Voltage Step-Down DC/DC Controller
with 100% Duty Cycle
LTC3891
60V, Low I_Q, Synchronous Step-Down DC/DC
Controller
LTC3890/LTC3890-1 60V, Low I_Q, Dual 2-Phase Synchronous
LTC3890-2/LTC3890-3 Step-Down DC/DC Controller
LTC3630
High Efficiency, 65V, 500mA Synchronous
Step-Down Regulator
Fixed Frequency 50kHz to 850kHz, 3.5V≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ V_IN,
I_Q = 40µA, MSOP-12E, 3mm × 4mm DFN-12
PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 24V,
I_Q = 50µA
PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 24V,
I_Q = 50µA
4V ≤ V_IN ≤ 65V, 0.8V ≤ V_OUT ≤ V_IN, I_Q = 12µA, 3mm × 5mm DFN-16 and
MSOP-16E
LTC3834/LTC3834-1
LTC3835/LTC3835-1
LT3758A
Low I_Q, Single Output Synchronous Step-Down
DC/DC Controllers with 99% Duty Cycle
High Input Voltage, Boost, Flyback, SEPIC and
Inverting Controller
PLL Fixed Frequency 140kHz to 650kHz, 4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 10V,
I_Q = 30µA/80µA
5.5V ≤ V_IN ≤ 100V, Positive or Negative V_OUT, 3mm × 3mm DFN-10 and
MSOP-10E
LTC3826/LTC3826-1
LTC3859AL
Low I_Q, Dual Output 2-Phase Synchronous
Step-Down DC/DC Controllers with 99% Duty Cycle
Low I_Q, Triple Output Buck/Buck/Boost
Synchronous DC/DC Controller
PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 10V,
I_Q = 30µA
All Outputs Remain in Regulation Through Cold Crank 2.5V ≤ V_IN ≤ 38V,
V_OUT(BUCKS) Up to 24V, V_OUT(BOOST) Up to 60V, I_Q = 28µA
3863fa
38 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 9503_F5_or-7_m4_o1_re7_{information www.linear.com/3863}
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LT 0714 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2013