Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
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.
Package Thermal Characteristics (Note 2)
TSSOP
Junction-to-Ambient Thermal Resistance (θ
JA
) .........38.3°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ...................3°C/W
Note 1:
Self-protected against transient voltages exceeding these limits for
≤
50ns under normal operation and loads up to the
maximum rated output current.
Note 2:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
SUP
= V
EN
= 14V, C
IN
= 10μF, C
OUT
= 94μF, C
BIAS
= 2.2μF, C
BST
= 0.1μF, R
FOSC
= 14.3kΩ, T
A
= T
J
= -40°C to +125°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
SUP Input Voltage Range
SUP Operating Supply Current
Skip Mode Supply Current
SUP Shutdown Supply Current
BIAS Voltage
BIAS Undervoltage Lockout
BIAS Undervoltage Lockout
Hysteresis
BIAS Minimum Load
OUTPUT VOLTAGE (OUT)
Output Voltage Adjustable
Range
OUT Pulldown Resistance
Output Voltage (5V Fixed Mode)
FB Feedback Voltage
(Adjustable Mode)
FB Current
FB Line Regulation
www.maximintegrated.com
SYMBOL
V
SUP
I
SUP
I
SKIP
I
SHDN,SUP
V
BIAS
V
UVBIAS
(Note 4)
CONDITIONS
Fixed 5V output, fixed-frequency, PWM
mode, V
FB
= V
BIAS
, no external FETs
connected
No load, fixed 5V output
V
EN
= 0V
V
SUP
= 3.5V, I
BIAS
= 45mA
6V < V
SUP
< 36V
V
BIAS
rising
V
BIAS
falling
MIN
3.5
TYP
MAX
36
UNITS
V
mA
1
50
10
3.0
4.7
5.0
3.1
200
45
5.3
3.4
90
20
μA
μA
V
V
mV
mA
I
BIAS(MIN)
V
SUP
- V
BIAS
> 200mV
1.0
R
PULL_D
V
OUT
V
FB
I
FB
V
EN
= 0V or fault condition active
V
SUP
= 6V to 36V, V
FB
= V
BIAS
,
fixed-frequency mode (Note 5)
V
SUP
= 6V to 36V, 0V < (V
CS
- V
OUT
) < 80mV,
fixed-frequency mode
V
FB
= 1.0V
V
EN
= V
SUP
, 6V < V
SUP
< 36V (Note 5)
4.925
0.99
30
5.0
1.0
0.02
0.02
10
V
5.075
1.01
V
V
μA
%/V
Maxim Integrated | 2
MAX16952
36V, 2.2MHz Step-Down Controller
with Low Operating Current
Electrical Characteristics (continued)
(V
SUP
= V
EN
= 14V, C
IN
= 10μF, C
OUT
= 94μF, C
BIAS
= 2.2μF, C
BST
= 0.1μF, R
FOSC
= 14.3kΩ, T
A
= T
J
= -40°C to +125°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
Transconductance (from FB to
COMP)
Error-Amplifier Output
Impedance
Operating Frequency
Minimum On-Time
Maximum FSYNC Frequency
Minimum FSYNC Frequency
FSYNC Logic-High Threshold
FSYNC Logic-Low Threshold
FSYNC Internal Pulldown
Resistance
CURRENT LIMIT
CS Input Current
OUT Input Current
CS Current-Limit Voltage
Threshold
FAULT DETECTION
Output Overvoltage Trip
Threshold
Output Overvoltage Trip
Hysteresis
Output Overvoltage Fault
Propagation Delay
Output Undervoltage Trip
Threshold
Output Undervoltage Trip
Hysteresis
Output Undervoltage Propagation
Delay
PGOOD Output Low Voltage
PGOOD Leakage Current
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
V
PGOOD,L
I
PGOOD
T
SHDN
(Note 6)
(Note 6)
Falling edge
Rising edge (excluding startup)
I
SINK
= 3mA
1
+175
15
t
OVP
V
FB,UV
Rising edge
Falling edge
V
OUT
= V
FB
; with respect to slewed FB
threshold, falling edge
83
V
FB,OV
V
OUT
= V
FB
, rising edge
108
113
2.5
25
25
88
2.5
25
25
0.4
93
118
%V
FB
%
μs
%V
FB
%
μs
V
μA
°C
°C
I
CS
I
OUT
V
LIMIT
V
CS
= V
OUT
= 0V or V
BIAS
(Note 6)
During normal operation
V
FB
= V
BIAS
V
CS
- V
OUT
, V
BIAS
= 5V, V
OUT
≥
2.5V
68
-1
22
32
80
92
+1
μA
μA
mV
SYMBOL
g
m,EA
R
OUT,EA
f
SW
t
ON(MIN)
f
FSYNC(MAX)
f
FSYNC(MIN)
V
FSYNC,HI
V
FSYNC,LO
1
f
FSYNC
> 110% of internal frequency (20%
duty cycle), f
SW
= 1000kHz
1.4
0.4
R
FOSC
= 30.1kΩ
R
FOSC
= 14.3kΩ
1800
CONDITIONS
MIN
TYP
1200
30
1000
2000
80
2400
1100
2200
MAX
UNITS
μS
MΩ
kHz
ns
kHz
kHz
V
V
MΩ
www.maximintegrated.com
Maxim Integrated | 3
MAX16952
36V, 2.2MHz Step-Down Controller
with Low Operating Current
Electrical Characteristics (continued)
(V
SUP
= V
EN
= 14V, C
IN
= 10μF, C
OUT
= 94μF, C
BIAS
= 2.2μF, C
BST
= 0.1μF, R
FOSC
= 14.3kΩ, T
A
= T
J
= -40°C to +125°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER
GATE DRIVE
DH Gate-Driver On-Resistance
DL Gate-Driver On-Resistance
DH/DL Dead Time (Note 6)
BST Input Current
BST On-Resistance
ENABLE INPUT
EN Input Threshold Low
EN Input Threshold High
EN Threshold Voltage
Hysteresis
EN Input Current
SOFT-START
Soft-Start Ramp Time
t
SS
5
ms
I
EN
V
EN,LO
V
EN,HI
2.2
0.2
0.5
1.2
V
V
V
μA
R
DH
R
DL
t
DEAD
I
BST
DH = high state
DH = low state
DL = high state
DL = low state
DL rising
DH rising
V
LX
= 0V, V
BST
= 5V,
V
DH
- V
LX
= V
DL
- V
PGND
= 0V
(Note 6)
10
2
3.5
2
30
30
1
5
15
ns
μA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 3:
Note 4:
Note 5:
Note 6:
Devices tested at T
A
= +25°C. Limits over temperature are guaranteed by design.
For 3.5V operation, the n-channel MOSFET’s threshold voltage should be compatible to (lower than) this input voltage.
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