SI9177 Datasheet, PDF (2/8 Pages) Vishay Siliconix – 200-mA PSM Step Down Converter with Bypass Capability

Si9177
Vishay Siliconix
New Product
ABSOLUTE MAXIMUM RATINGS (T_A = 25_C)
V_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V
BP/PSM, ENABLE, F_B, L_X . . . . . . . . . . . . . . . . . . . . . . . . - 0.3 V to V_IN + 0.3 V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55 to 150_C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C
Power Dissipation (Package)^a.
MLP33-10^b. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481 mW
MSOP-10^c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 915 mW
Thermal Impedance (Q_JA)
MLP33-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135_C/W
MSOP-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71_C/W
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 7.4 mW/ _C above 25_C.
c. Derate 14 mW/ _C above 25_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.
RECOMMENDED OPERATING RANGE
V_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 V to 6 V
C_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mF
C_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mF
Inductor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 mH
C_REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . - 25 to 85 _C
SPECIFICATIONS
Parameter
Converter Operation
Input Voltage
Maximum Bypass Mode Current
Maximum PSM Mode Current
MOSFET On-resistance
Power Supply Rejection
Symbol
V_IN
I_OUT
r_DS(on)
PSRR
Feedback Voltage
Start-Up
Start-Up Delay Time
Soft Start Time
ENABLE, BP/PSM
Logic High
Logic Low
Input Current
Protection
Under Voltage Lockout
Under Voltage Lockout Hysteresis
Thermal Shutdown
Thermal Shutdown Hysteresis
Supply Current
BP Mode
PSM Mode
Shutdown
V_FB
t_DELAY
t_ss
V_IH
V_IL
I_IH
I_IL
V_UVLO
V_HUVLO
T_SD
T_HSD
I_IN
Test Conditions Unless Specified
- 40_C to 85_C, V_IN = V_DD,, C_IN = 10 mF
C_OUT = 4.7 mF, L = 2.2 mH, 2.6 V v V_IN v 5.5 V
R₁ = 11.3 kW, R₂ = 20 kW
V_IN w 3.3 V
I_REF = 0
I_REF = 0, TA = 25_C
C_REF = 0.1 mF, See Figure 1
See Figure 1
ENABLE, BP/PSM = V_IN
ENABLE, BP/PSM = GND
Temperature rising
V_IN = 3.3 V
V_IN = 3.3 V
V_IN = 3.3 V, ENABLE = 0 V
Min^a
Limits
Typ^b
Max^a
2.7
800
200
1.175
1.195
150
60
1.215
1.215
6
300
1.255
1.235
5
100
1.5
0.4
1
1
2.2
2.35
2.5
0.1
165
25
75
110
190
250
1
Notes
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
b. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.
c. Guaranteed by design and characterization, not subject to production testing.
Unit
V
mA
mW
dB
V
ms
ms
V
mA
V
_C
mA
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2
Document Number: 70312
S-03663—Rev. B, 07-Apr-03