MAX1636 Maxim, MAX1636 Datasheet - Page 2

• Manufacturer Part Number: MAX1636
• Description: Low-Voltage / Precision Step-Down Controller for Portable CPU Power
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
V+ to GND ...............................................................-0.3V to 36V
GND to PGND........................................................................±2V
SHDN to GND. ......................................................... -0.3V to 36V
LX, BST to GND. ...................................................... -0.3V to 36V
DH, BST to LX .............................................................-0.3V to 6V
VL, V
DL to GND.. ..................................................-0.3V to (VL + 0.3V)
REF, RESET, SYNC, CC, OVP to GND. ..... -0.3V to (V
VL Output Current... ............................................................50mA
VL Short Circuit to GND..............................................Momentary
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V
are at T
2
Input Voltage Range, V+
Input Voltage Range, VL
Input Voltage Range, V
Output Voltage, Adj Mode
Output Voltage, Fixed 2.5V Mode
Output Voltage, Fixed 3.3V Mode
Output Adjustment Range
Current-Limit Threshold
Power Consumption
Shutdown Supply Current (V+)
FB Input Current
Soft-Start Ramp Time
Idle Mode Switchover Threshold
SMPS CONTROLLER
_______________________________________________________________________________________
CC
A
, CSL, CSH, FB, SKIP to GND ...................... -0.3V to 6V
= +25°C.)
PARAMETER
CC
Input source for VL regulator
Gate-driver supply rail
Internal chip supply rail
FB tied to V
< V+ < 30V (includes line and load regulation)
FB tied to V
< V+ < 30V (includes line and load regulation)
FB tied to GND, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
V
V
Positive direction
Negative direction
V
V
SHDN = GND, OVP = GND
FB forced to REF
SHDN to full current limit, five levels
CSH - CSL
CC
CC
CC
CC
CC
= VL = 5V
= 3.3V, VL = 5V
= 5V, output not switching
= 3.3V, output not switching
, I
VL
CC
OUT
CC
= 0mA, I
+ 0.3V)
, 0mV < (CSH - CSL) < 80mV, 4.5V
, 0mV < (CSH - CSL) < 80mV, 4.5V
CONDITIONS
REF
= 0mA, T
REF Output Current ............................................................20mA
REF Short Circuit to GND ....... ......................................Indefinite
Continuous Power Dissipation (T
Operating Temperature Range
Storage Temperature Range .............................-65°C to +160°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10sec) .............................+300°C
SSOP (derate 8.00mW/°C above +70°C) .....................640mW
MAX1636EAP. ..................................................-40°C to +85°C
A
= 0°C to +85°C, unless otherwise noted. Typical values
1.090
2.486
3.282
V
V
3.15
-145
MIN
4.5
4.2
-50
80
20
REF
REF
A
= +70°C)
1.100
3.366
TYP
2.55
-100
100
512
30
3
1.110
2.614
3.450
MAX
120
-55
5.5
5.5
5.5
3.6
2.0
1.5
30
10
50
40
UNITS
clks
mW
mV
mV
mV
µA
nA
V
V
V
V
V
V
V