Datasheet

MAX16993 Step-Down Controller with
Dual 2.1MHz Step-Down DC-DC Converters
www.maximintegrated.com
Maxim Integrated │ 3
Electrical Characteristics (continued)
(V
SUP
= 14V, V
PV1
= V
BIAS
, V
PV2
= V
PV3
= V
OUT1
; T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at
T
A
= +25°C under normal conditions, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUT1: HIGH-VOLTAGE SYNCHRONOUS STEP-DOWN DC-DC CONTROLLER
OUT1 Switching Frequency f
SW1
Internally generated
(see the Selector
Guide)
V
CSEL1
= V
GND
2100
kHz
V
CSEL1
= V
BIAS
(factory option)
1050
V
CSEL1
= V
BIAS
(factory option)
525
V
CSEL1
= V
BIAS
(factory option)
420
V
CSEL1
= V
BIAS
(factory option)
350
Voltage V
OUT1
Fixed option
(see the Selector
Guide)
V
FB1
= V
GND
3.3
V
V
FB1
= V
BIAS
(factory option)
5.0
V
FB1
= V
BIAS
(factory option)
3.15
FB1 Regulation Voltage Adjustable option (see the Selector Guide) 0.985 1.0 1.019 V
ErrorAmplier
Transconductance
g
MEA
300 700 1200 µS
Voltage Accuracy V
OUT1
5.5V≤V
SUP
≤18V,0<V
LIM1
<75mV,
PWM mode
-2.0 +2.5 %
DC Load Regulation PWM mode 0.02 %/A
DC Line Regulation PWM mode 0.03 %/V
OUT1 Discharge Resistance V
EN1
= V
GND
or V
SUP
100 200 Ω
High-Side Output Drive
Resistance
V
DH1
rising, I
DH1
= 100mA 2 4
Ω
V
DH1
falling, I
DH1
= 100mA 1 4
Low-Side Output Drive
Resistance
V
DL1
rising, I
DL1
= 100mA 2.5 5
Ω
V
DL1
falling, I
DL1
= 100mA 1.5 3
Output Current-Limit
Threshold
V
LIM1
CSI – OUT1 100 120 150 mV
Skip Current Threshold I
SKIP
CS1 – OUT1, no load 10 35 60 mV
Soft-Start Ramp Time 4 ms
LX_ Leakage Current V
LX1
= V
SUP
0.01 µA
Duty-Cycle Range PWM mode 97.2 %
Minimum On-Time 60 75 ns
OUT1 OV Threshold 107 110 113 %