Datasheet

MAX15036/MAX15037
2.2MHz, 3A Buck or Boost Converters
with an Integrated High-Side Switch
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = V
L
= 5V or V+ = 5.5V to 23V, V
EN
= 5V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Circuits of Figures 5 and 6. Typical
values are at T
A
= T
J
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SOFT-START
Digital Soft-Start Period Internal 6-bit DAC 4096
Clock
periods
Soft-Start Steps 64 Steps
ERROR AMPLIFIER (FB and COMP)
FB to COMP Transconductance g
M
1.20 1.8 2.75 mS
FB Input Bias Current I
FB
250 nA
FB Input Voltage Set Point V
FB
0.591 0.600 0.609 V
COMP Sink-and-Source Current
Capability
I
COMP
100 150 μA
INTERNAL MOSFETs
On-Resistance n-Channel Power
MOSFET
R
ON
V+ = V
L
= 5.2V, I
SINK
= 100mA 0.150 0.302 Ω
Leakage Current I
LEAK
V
EN
= 0V, V
DRAIN
= 23V,
SOURCE = PGND
20 μA
Minimum Output Current I
OUT
V
OUT
= 3.3V, V+ = 12V (Note 3) 3 A
Peak Current Limit I
LIMIT
3.56 4.6 5.6 A
On-Resistance Internal Low-Side
Switch
R
ONLSW
I
SWITCH
= 50mA, V+ = V
L
= 5.2V 20 40 Ω
SYNCHRONOUS RECTIFIER DRIVER (DL) (MAX15037 Only)
On-Resistance nMOS R
ONDLN
I
SINK
= 10mA 1 4 Ω
On-Resistance pMOS R
ONDLP
I
SOURCE
= 10mA 1.9 5 Ω
Peak Sink Current I
IDL_SINK
1A
Peak Source Current I
IDL_SOURCE
0.75 A
CLOCK OUTPUT (CKO) (MAX15036 Only)
Clock Output-High Level V
CKOH
V
L
= 5.2V, I
SOURCE
= 5mA 3.54 V
Clock Output-Low Level V
CKOL
V
L
= 5.2V, I
SINK
= 5mA 0.4 V
Clock Output Phase Delay With
Respect to SOURCE Waveform
CKO
PHASE
R
OSC
= 10kΩ, SYNC = GND
(Note 4)
115 Degrees
OSCILLATOR (OSC)/SYNCHRONIZATION (SYNC)
R
OSC
= 5.62kΩ 2100
R
OSC
= 41.2kΩ 312
Switching Frequency f
SW
V+ = V
L
= 5.2V
R
OSC
= 10kΩ 1130 1250 1380
kHz
Minimum Controllable On-Time t
ON_MIN
120 ns
Maximum Duty Cycle D
MAX
f
SW
= 2.2MHz 82 87.5 %