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LTC1704EGN#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
LTC1704/LTC1704B
4
1704bfa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50
V
FB
(V)
0.804
0.808
0.812
25 75
1704 G01
0.800
0.796
–25 0
50 100 125
0.792
0.788
V
CC
= 5V
V
CC
(V)
3
–0.80
∆V
FB
(mV)
∆V
FB
(%)
–0.48
–0.16
0.16
3.5
4
4.5 5
1704 G02
5.5
0.48
0.80
–0.64
–0.32
0
0.32
0.64
–0.10
–0.06
–0.02
0.02
0.06
0.10
–0.08
–0.04
0
0.04
0.08
6
T
A
= 25°C
I
LOAD
(A)
0
–0.6
0
0.6
12
1704 G03
–1.2
–1.8
369 15
–2.4
–3.0
–3.6
–0.03
0.03
0
–0.07
–0.10
–0.13
–0.17
–0.20
∆V
OUTSW
(mV)
∆V
OUTSW
(%)
T
A
= 25°C
V
OUTSW
= 1.8V
V
FB
Line Regulation
V
OUTSW
0.5A to 5.5A Load Step
(Burst Mode Operation)
V
OUTSW
Load Regulation
100µs/DIV 1704 G05
CH1: V
OUTSW
= 1.8V, AC 50mV/DIV
CH2: 0.5A to 5.5A LOAD, 5A DIV
V
OUTSW
5A to 10A Load Step
50µs/DIV 1704 G06
CH1: V
OUTSW
= 1.8V, AC 50mV/DIV
CH2: 5A to 10A LOAD, 5A DIV
20µs/DIV 1704 G07
CH1: V
OUTSW
= 1.8V, AC 20mV/DIV
CH2: V
TG
, 5V DIV
V
OUTSW
Burst Mode Operation
at 1A Load
TEMPERATURE (°C)
–50
18
20
24
25 75
1704 G08
16
14
–25 0
50 100 125
12
10
22
CURRENT LIMIT THRESHOLD (A)
V
IN
= 5V
V
OUTSW
= 1.8V
∆V
OUTSW
= –1%
R
IMAX
= 13.7k
QT = QB = 2xFDS6670A
Switcher Current Limit Threshold
vs Temperature
V
FB
vs Temperature
LTC1704/LTC1704B
5
1704bfa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
OUTSW
vs Load Current
LOAD CURRENT (A)
0
V
OUTSW
(V)
1.0
1.5
16
1704 G09
0.5
0
4
8
12
20
2.0
V
IN
= 5V
V
OUTSW
= 1.8V
T
A
= 25°C
R
IMAX
= 13.7k
QT = QB = 2xFDS6670A
TEMPERATURE (°C)
–50
I
IMAX
(µA)
–9.5
–9.0
–8.5
25 75
1704 G10
–10.0
–10.5
–25 0
50 100 125
–11.0
–11.5
V
CC
= 5V
V
CC
(V)
3
–11.5
I
IMAX
(µA)
–11.0
–10.5
–10.0
–9.5
–8.5
3.5
4 4.5 5
1704 G11
5.5 6
–9.0
T
A
= 25°C
I
IMAX
vs Temperature I
IMAX
vs V
CC
f
OSC
vs Temperature
TEMPERATURE (°C)
–50
460
f
OSC
(kHz)
480
520
540
560
50
640
1704 G12
500
0
–25
75 100
25 125
580
600
620
V
CC
= 5V
f
OSC
vs V
CC
V
CC
(V)
3
450
f
OSC
(kHz)
490
530
570
610
650
3.5
4 4.5 5
1704 G13
5.5 6
T
A
= 25°C
Maximum TG Duty Cycle
vs Temperature
TEMPERATURE (°C)
–50
DC
MAX
(%)
91
92
93
25 75
1704 G10
90
89
–25 0
50 100 125
88
87
V
CC
= 5V
TG, BG FLOAT
Drivers Rise and Fall Time
vs Load
TG, BG LOAD (pF)
0
t
r
, t
f
(ns)
60
80
100
8000
1704 G15
40
20
50
70
90
30
10
0
2000
4000
6000
10000
T
A
= 25°C
PV
CC
= BOOST = 5V
V
REGFB
vs Temperature
TEMPERATURE (°C)
–50
V
REGFB
(V)
0.815
25
LTXXX • TPCXX
0.800
0.790
–25 0 50
0.785
0.780
0.820
0.810
0.805
0.795
75 100 125
V
REGDR
= 3.3V
V
REGFB
Line Regulation
V
CC
(V)
3
∆V
REGFB
(mV)
∆V
REGFB
(%)
–0.4
0
0.4
4.5
5.5
1704 G17
–0.8
–1.2
–1.6
3.5 4 5
0.8
1.2
1.6
–0.05
0
0.05
–0.10
–0.15
–0.20
0.10
0.15
0.20
6
T
A
= 25°C
V
REGDR
= 0.8V
LTC1704/LTC1704B
6
1704bfa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
OUTREG
Load Regulation
Linear Regulator Dropout Voltage
vs Temperature
I
OUTREG
(A)
0
–0.5
0
0.5
1.6
1704 G18
–1.0
–1.5
0.4 0.8 1.2 2
–2.0
–2.5
–3.0
–0.03
0.03
0
–0.07
–0.10
–0.13
–0.17
–0.20
∆V
OUTREG
(mV)
∆V
OUTREG
(%)
T
A
= 25°C
V
OUTREG
= 1.5V
I
REGILM
= 9µA
QEXT = D44H11
TEMPERATURE (°C)
–50
V
DROPOUT
(V)
1.0
25
1704 G19
0.7
0.5
–25 0 50
0.4
0.3
1.1
0.9
0.8
0.6
75 100 125
I
REGDR
= –30mA
V
REGDR
= 3.3V
V
OUTREG
0.1A to 2.1A Load Step
50µs/DIV 1704 G20
CH1: V
OUTREG
= 1.5V, AC 50mV/DIV
CH2: 0.1A to 2.1A LOAD, 1A DIV
Minimum V
CC
vs V
OUTREG
V
OUTREG
(V)
0.9
3.0
MINIMUM V
CC
(V)
3.5
4.0
4.5
5.0
5.5
1.3
1.7 2.1 2.5
1704 G21
2.9 3.3
I
REGILM
= 9µA
I
OUTREG
= 2A
∆V
OUTREG
= –1%
QEXT = D44H11
T
A
= –40°C
T
A
= 25°C
C
DELAY
(pF)
0
START-UP TIME (µs)
300
900
1000
1100
6000
8000
1704 G22
100
700
500
200
800
0
600
400
2000
4000
10000
T
A
= 25°C
V
OUTREG
= 1.5V
I
REGILM
= 6.2µA
I
REGILM
= 9µA
I
REGILM
(µA)
0
35
30
25
20
15
10
5
0
610
1704 G23
24
812
I
REGDR
(mA)
Linear Regulator Start-Up Time
vs C
DELAY
I
REGDR
vs I
REGILM
Linear Regulator Current Limit
Threshold vs Temperature
TEMPERATURE (°C)
–50
1.0
CURRENT LIMIT THRESHOLD (A)
1.5
2.0
2.5
3.0
–25 0 25 50
1704 G24
75 100 125
V
INREG
= 1.8V
V
OUTREG
= 1.5V
I
REGILM
= 9µA
QEXT = D44H11
I
OUTREG
(A)
0
0
V
OUTREG
(V)
0.5
1.0
1.5
2.0
0.5 1 1.5 2
1704 G25
2.5 3
T
A
= 25°C
V
INREG
= 1.8V
V
OUTREG
= 1.5V
I
REGILM
= 9µA
QEXT = D44H11
V
OUTREG
vs Load Current
V
REGFB
(V)
0
0
I
REGDR
(mA)
5
10
15
20
0.2 0.4
0.6
0.8
1704 G28
25
30
0.1 0.3
0.5
0.7
I
REGILM
= 9µA
I
REGILM
= 6.2µA
T
A
= 25°C
V
REGDR
= 0V
I
REGDR
vs V
REGFB
V
OUT
I
LOAD
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28

LTC1704EGN#PBF

Mfr. #:
Buy LTC1704EGN#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Step-Down DC/DC Controller
Lifecycle:
New from this manufacturer.
Delivery:
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Payment:
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