Lo w -Vo lt a g e , P re c is io n S t e p -Do w n
Co n t ro lle r fo r P o rt a b le CP U P o w e r
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
REF Output Current ............................................................20mA
REF Short Circuit to GND ....... ......................................Indefinite
Continuous Power Dissipation (T = +70°C)
A
SSOP (derate 8.00mW/°C above +70°C) .....................640mW
Operating Temperature Range
MAX1636EAP. ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10sec) .............................+300°C
VL, V , CSL, CSH, FB, SKIP to GND ...................... -0.3V to 6V
DL to GND.. ..................................................-0.3V to (VL + 0.3V)
CC
REF, RESET, SYNC, CC, OVP to GND...... -0.3V to (V + 0.3V)
CC
MAX136
VL Output Current...............................................................50mA
VL Short Circuit to GND..............................................Momentary
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 , I = 0mA, I
= 0mA, T = 0°C to +85°C, unless otherwise noted. Typical values
A
CC VL
REF
are at T = +25°C.)
A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SMPS CONTROLLER
Input Voltage Range, V+
Input Voltage Range, VL
Input source for VL regulator
Gate-driver supply rail
4.5
4.2
30
5.5
5.5
V
V
V
Input Voltage Range, V
Internal chip supply rail
3.15
CC
FB tied to V
< V+ < 30V (includes line and load regulation)
, 0mV < (CSH - CSL) < 80mV, 4.5V
OUT
Output Voltage, Adj Mode
Output Voltage, Fixed 2.5V Mode
Output Voltage, Fixed 3.3V Mode
Output Adjustment Range
Current-Limit Threshold
1.090
2.486
3.282
1.100
2.55
1.110
2.614
3.450
V
V
V
V
FB tied to V , 0mV < (CSH - CSL) < 80mV, 4.5V
CC
< V+ < 30V (includes line and load regulation)
FB tied to GND, 0mV < (CSH - CSL) < 80mV, 4.5V
< V+ < 30V (includes line and load regulation)
3.366
V
CC
= VL = 5V
V
REF
5.5
3.6
120
-55
2.0
1.5
10
V
CC
= 3.3V, VL = 5V
V
REF
Positive direction
Negative direction
80
100
mV
mV
-145
-100
V
= 5V, output not switching
= 3.3V, output not switching
CC
Power Consumption
mW
V
CC
Shutdown Supply Current (V+)
FB Input Current
3
µA
nA
SHDN = GND, OVP = GND
FB forced to REF
-50
20
50
Soft-Start Ramp Time
512
30
clks
mV
SHDN to full current limit, five levels
CSH - CSL
Idle Mode Switchover Threshold
40
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
