Typical operating characteristics – Rainbow Electronics MAX17117 User Manual
Page 7
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
MAX17117
_______________________________________________________________________________________ 7
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENT
MAX17117 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
100
10
50
60
70
80
90
100
40
1
1000
V
IN
= 5.0V
V
IN
= 3.0V
V
IN
= 2.3V
V
MAIN
= 8.5V
STEP-UP REGULATOR LINE REGULATION
vs. INPUT VOLTAGE
MAX17117 toc02
IN VOLTAGE (V)
LINE REGULATION (%)
5.1
4.7
4.3
3.9
3.5
3.1
2.7
0.05
0.10
I
MAIN
= 200mA
I
MAIN
= 0mA
0.15
0.20
0.25
0
2.3
5.5
LOAD CURRENT (mA)
LOAD-REGULATION ERROR (%)
100
10
1
1000
STEP-UP REGULATOR OUTPUT LOAD
REGULATION vs. LOAD CURRENT
MAX17117 toc03
-0.40
-0.30
-0.20
-0.10
0
0.10
-0.50
V
IN
= 5.0V
V
IN
= 2.3V
V
IN
= 3.0V
STEP-UP CONVERTER PEAK INDUCTOR
CURRENT LIMIT vs. R
ENA
MAX17117 toc04
R
ENA
(kI)
PEAK INDUCTOR CURRENT LIMIT (A)
200
150
100
50
1.0
1.5
V
IN
= 3.3V
V
MAIN
= 8.5V
V
LDO
= 2.5V
L1 = 10µH
2.0
2.5
3.0
0.5
0
250
STEP-UP REGULATOR LOAD-TRANSIENT
RESPONSE (20mA TO 300mA)
MAX17117 toc05
INDUCTOR
CURRENT
1A/div
V
MAIN
(AC-COUPLED)
200mV/div
I
MAIN
200mA/div
20mA
L1 = 10µH
R
COMP
= 56.2kI
C
COMP
= 1000pF
V
LX
10V/div
0V
0V
0A
100µs/div
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE (20mA TO 1A)
MAX17117 toc06
INDUCTOR
CURRENT
500mA/div
V
MAIN
(AC-COUPLED)
100mV/div
I
MAIN
1A/div
20mA
L1 = 10µH
R
COMP
= 56.2kI
C
COMP
= 1000pF
V
LX
10V/div
0V
0V
0A
10µs/div
LOAD CURRENT (mA)
LOAD-REGULATION ERROR (%)
100
10
1
1000
LDO OUTPUT LOAD REGULATION
vs. LOAD CURRENT
MAX17117 toc07
-0.40
-0.30
-0.20
-0.10
0
0.10
-0.50
V
IN
= 3.0V
V
IN
= 5.0V