Datasheet

SW
Ramp
Generator
Oscillator
Current
Sensor
CTRL
GND
C3
L1
+
FB
BandGap
D1
Error
Amplifer
2
1
R2
C2
Vin
C1
PWMControl
4
6
Soft
Start-up
5
3
COMP
R1
R3
TPS61170
www.ti.com SLVS789C – NOVEMBER 2007– REVISED APRIL 2011
FUNCTIONAL BLOCK DIAGRAM
TYPICAL CHARACTERISTICS
TABLE OF GRAPHS
Circuit of Figure 1, L = TOKO A915_Y-100M, D1 = ONsemi MBR0540T1, unless otherwise noted. FIGURE
Efficiency VIN = 5V; VOUT = 12V,18V,24V,30V Figure 2
Efficiency VIN = 5V, 8.5V, 12V; VOUT = 24V Figure 3
Output voltage accuracy I
LOAD
= 100 mA Figure 4
Switch current limit T
A
= 25°C Figure 5
Switch current limit Figure 6
Error amplifier transconductance Figure 7
Easyscale step Figure 8
PWM switching operation VIN = 5V; VOUT = 12V; I
LOAD
= 250mA Figure 9
Load transient response VIN = 5V; VOUT = 12V; I
LOAD
= 50mA to 150mA Figure 10
Start-up VIN = 5V; VOUT = 12V; I
LOAD
= 250mA Figure 11
Skip-cycle switching VIN = 9V ; VOUT = 12V, I
LOAD
= 100μA Figure 12
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