Datasheet

MAX5038/MAX5041
Dual-Phase, Parallelable, Average Current-Mode
Controllers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, circuit of Figure 1, T
A
= -40°C to +85°C, unless otherwise noted. Typical specifications are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OSCILLATOR AND PLL
CLKIN = SGND
238 250
262
Switching Frequency f
SW
CLKIN = V
CC
475 500
525
kHz
PLL Lock Range f
PLL
125
600 kHz
PLL Locking Time t
PLL
200
µs
PHASE = V
CC
115 120
125
PHASE = unconnected 85 90 95
CLKOUT Phase Shift
(at f
SW
= 125kHz)
φ
CLKOUT
PHASE = SGND 55 60 65
degrees
CLKIN Input Pulldown Current I
CLKIN
357µA
CLKIN High Threshold
V
CLKINH
2.4 V
CLKIN Low Threshold
V
CLKINL
0.8 V
CLKIN High Pulse Width t
CLKIN
200
ns
PHASE High Threshold
V
PHASEH
4V
PHASE Low Threshold
V
PHASEL
1V
PHASE Input Bias Current
I
PHASEBIA
-50
+50
µA
CLKOUT Output Low Level
V
CLKOUTL
I
SINK
= 2mA (Note 2) 100 mV
CLKOUT Output High Level
V
CLKOUTH
I
SOURCE
= 2mA (Note 2) 4.5 V
CURRENT LIMIT
Average Current-Limit Threshold
V
CL
CSP_ to CSN_ 45 48 51 mV
Cycle-by-Cycle Current Limit V
CLPK
CSP_ to CSN_ (Note 3) 90
112
130 mV
Cycle-by-Cycle Overload
Response Time
t
R
V
CSP
_ to V
CSN
_ = +150mV
260
ns
CURRENT-SENSE AMPLIFIER
CSP_ to CSN_ Input Resistance R
CS
_4kΩ
Common-Mode Range
V
CMR
(
CS
)
-0.3 +3.6
V
Input Offset Voltage
V
OS
(
CS
)
-1 +1 mV
Amplifier Gain A
V(CS)
18 V/V
3dB Bandwidth f
3dB
4 MHz
CURRENT-ERROR AMPLIFIER (TRANSCONDUCTANCE AMPLIFIER)
Transconductance gm
ca
550
µS
Open-Loop Gain
A
VOL
(
CE
)
No load 50 dB
DIFFERENTIAL VOLTAGE AMPLIFIER (DIFF)
Common-Mode Voltage Range
V
CMR
(
DIFF
)
-0.3 +1.0
V
DIFF Output Voltage V
CM
V
SENSE+
= V
SENSE-
= 0 0.6 V
Input Offset Voltage
V
OS
(
DIFF
)
-1 +1 mV
MAX5038/MAX5041 (+1.2V, +1.5V, +1.8V
output versions)
0.997
1
1.003
Amplifier Gain
A
V
(
DIFF
)
MAX5038 (+2.5V and +3.3V output versions)
0.495
0.5
0.505
V/V